For the past 2 seasons of Rick and Morty, our animation team creates a crew photo. This season we went with the EPIC citadel battle from 301. Hope you enjoyed watching it as much as we enjoyed making it! – Mark Van Ee
For the past 2 seasons of Rick and Morty, our animation team creates a crew photo. This season we went with the EPIC citadel battle from 301. Hope you enjoyed watching it as much as we enjoyed making it! – Mark Van Ee
And why do we need a new standard? Do our ISP support IPv6? In what way? No clue? Neather do I. But help is on the way…somewhere, in a galaxy far far away:
– Internet is the global wide network used for communication between hosts connected to it.
– These connected hosts (PCs, servers, routers, mobile devices, etc.) must have a global unique addresses to be able to communicate through the Internet and these unique addresses are defined in the Internet Protocol (IP).
– When IPv4 was developed in 1975, it was not expected that the number of connected hosts to the Internet reach a very huge number of hosts more than the IPv4 address space, also it was aimed to be used for experimental purposes in the beginning.
– IPv4 is (32-bits) address allowing approximately 4.3 billion unique IP addresses.
– A few years ago, with the massive increase of connected hosts to the Internet, IPv4 addresses started to run out.
– Three short-term solutions (CIDR, Private addressing, and NAT) were introduced in the mid-1990s but even with using these solutions, the IPv4 address space ran out in February, 2011 as announced by IANA, The announcement of depletion of the IPv4 address space by the RIRs is as follows:
* April, 2011: APNIC announcement.
* September, 2012: RIPE NCC announcement.
* June, 2014: LACNIC announcement.
* September, 2015: ARIN announcement.
– A long term solution (IPv6) was introduced to increase the address space used by the Internet Protocol and this was defined in the Internet Protocol version 6 (IPv6).
– IPv6 was developed in 1998 by the Internet Engineering Task Force (IETF).
– IPv6 is (128-bits) address and can support a huge number of unique IP addresses that is approximately equals to 2^128 unique addresses.
– So, the need for IPv6 became a vital issue to be able to support the massive increase of connected hosts to the Internet after the IPv4 address space exhaustion.
– The migration from IPv4 to IPv6 became a necessary thing, but unfortunately, it would take decades for this full migration to be accomplished.
– 19 years have passed since IPv6 was developed, but no full migration happened till now and this would cause the Internet to be divided into two parts, as IPv4 still dominating on the Internet traffic (85% as measured by Google in April, 2017) and new Internet hosts will be assigned IPv6-only addresses and be able to communicate with
15% only of the Internet services and apps.
– So, the need for solutions for the IPv4 and IPv6 coexistence became an important issue in the migration process as we cannot wake up in the morning and find all IPv4 hosts are migrated to be IPv6 hosts, especially, as most enterprises have not do this migration for creating a full IPv6 implementation.
– Also, the request for using IPv6 addresses in addition to the existing IPv4 addresses (IPv4/IPv6 Dual Stacks) in all enterprise networks have not achieve a large implementation that can make IPv6 the most dominated IP in the Internet as many people believe that they will not have benefits from just having a larger IP address
bits and IPv4 satisfies their needs, also, not all enterprises devices support IPv6 and also many people are afraid of the service outage that can be caused due to this migration.
– The recent solutions for IPv4 and IPv6 coexistence are:
– IPv4/IPv6 Dual Stack, allows both IPv4 and IPv6 to coexist by using both IPv4 and IPv6 addresses for all hosts at the same time, but this solution does not allows IPv4 hosts to communicate to IPv6 hosts and vice versa. Also, after the depletion of the IPv4 address space, new Internet hosts will not be able to use IPv4/IPv6 Dual Stacks.
– Tunneling, allows IPv6 hosts to communicate to each other through an IPv4 network, but still does not allows IPv4 hosts to communicate to IPv6 hosts and vice versa.
– NAT-PT, allows IPv6 hosts to communicate to IPv4 hosts with only using hostnames and getting DNS involved in the communication process but this solution was inefficient because it does not allows communication using direct IP addresses, also the need for so much protocol translations of the source and destination IP addresses made the solution complex and not applicable thats why it was moved to the Historic status in the RFC 2766. Also, NAT64 requires so much
protocol translations and statically configured bindings, and also getting a DNS64 involved in the communication process.
– IPv10 is the solution presented in this Internet draft.
– It solves the issue of allowing IPv6 only hosts to communicate to IPv4 only hosts and vice versa in a simple and very efficient way, especially when the communication is done using both direct IP addresses and when using hostnames between IPv10 hosts, as there is no need for protocol translations or getting the DNS involved in the communication process more than its normal address resolution function.
– IPv10 allows hosts from two IP versions (IPv4 and IPv6) to be able to communicate, and this can be accomplished by having an IPv10 packet containing a mixture of IPv4 and IPv6 addresses in the same IP packet header.
– From here the name of IPv10 arises, as the IP packet can contain (IPv6 + IPv4 /IPv4 + IPv6) addresses in the same layer 3 packet header.
Jupiter’s polar regions—anywhere between 10 and 30 times greater than any seen on Earth. Which they expected—everything’s bigger and badder on Jupiter. Trouble is, Jupiter’s aurora isn’t 10 or even 30 times stronger than Earth’s. It’s about a hundred times stronger. And there is no Earthly explanation for that discrepancy.
“Basically, the aurora is a factor of 10 brighter than it should be based on Earth-like physics,” Mauk says.
Whatever process accelerates Jupiter’s electrons up to a million electron volts is likely a total unknown. And Mauk, with the help of theorists and data from a few more orbits, is already on the trail of what that might be. “After orbit seven we saw what I would consider to be the smoking gun,” Mauk says. Mauk’s Jedi instrument saw the characteristic inverted V structure, but the electron excitement didn’t end there. As the electrical potential rose at the peak of the V, the acceleration went from coherent and linear to random—Mauk calls that a stochastic acceleration process. “Something goes unstable, and you start forming these waves,” Mauk says. “Some electrons gain a lot of energy, some just a little.”
What makes things get all unstable and random? Unclear.
I hope this letter finds you well. I can hear your complaint already, “Gordon Freeman, we have not heard from you in ages!” Well, if you care to hear excuses, I have plenty, the greatest of them being I’ve been in other dimensions and whatnot, unable to reach you by the usual means. This was the case until eighteen months ago, when I experienced a critical change in my circumstances, and was redeposited on these shores. In the time since, I have been able to think occasionally about how best to describe the intervening years, my years of silence. I do first apologize for the wait, and that done, hasten to finally explain (albeit briefly, quickly, and in very little detail) events following those described in my previous game (referred to herewith as Episode 2).
To begin with, as you may recall from the closing paragraphs of my previous missive, the death of Eli Vance shook us all. The Resistance team was traumatized, unable to be sure how much of our plan might be compromised, and whether it made any sense to go on at all as we had intended. And yet, once Eli had been buried, we found the strength and courage to regroup. It was the strong belief of his brave daughter, the feisty Alyx Vance, that we should continue on as her father had wished. We had the Antarctic coordinates, transmitted by Eli’s long-time assistant, Dr. Judith Mossman, which we believed to mark the location of the lost luxury liner Borealis. Eli had felt strongly that the Borealis should be destroyed rather than allow it to fall into the hands of the Combine. Others on our team disagreed, believing that the Borealis might hold the secret to the revolution’s success. Either way, the arguments were moot until we found the vessel. Therefore, immediately after the service for Dr. Vance, Alyx and I boarded a seaplane and set off for the Antarctic; a much larger support team, mainly militia, was to follow by separate transport.
It is still unclear to me exactly what brought down our little aircraft. The following hours spent traversing the frigid waste in a blizzard are also a jumbled blur, ill-remembered and poorly defined. The next thing I clearly recall is our final approach to the coordinates Dr. Mossman has provided, and where we expected to find the Borealis. What we found instead was a complex fortified installation, showing all the hallmarks of sinister Combine technology. It surrounded a large open field of ice. Of the Borealis itself there was no sign…or not at first. But as we stealthily infiltrated the Combine installation, we noticed a recurent, strangely coherent auroral effect–as of a vast hologram fading in and out of view. This bizarre phenomenon initially seemed an effect caused by an immense Combine lensing system, Alyx and I soon realized that what we were actually seeing was the luxury liner Borealis itself, phasing in and out of existence at the focus of the Combine devices. The aliens had erected their compound to study and seize the ship whenever it materialized. What Dr. Mossman had provided were not coordinates for where the sub was located, but instead for where it was predicted to arrive. The liner was oscillating in and out of our reality, its pulses were gradually steadying, but there was no guarantee it would settle into place for long–or at all. We determined that we must put ourselves into position to board it at the instant it became completely physical.
At this point we were briefly detained–not captured by the Combine, as we feared at first, but by minions of our former nemesis, the conniving and duplicitous Wallace Breen. Dr. Breen was not as we had last seen him–which is to say, he was not dead. At some point, the Combine had saved out an earlier version of his consciousness, and upon his physical demise, they had imprinted the back-up personality into a biological blank resembling an enormous grub. The Breen-grub, despite occupying a position of relative power in the Combine hierarchy, seemed nervous and frightened of me in particular. Wallace did not know how his previous incarnation, the original Dr. Breen, had died. He knew only that I was responsible. Therefore the grub treated us with great caution. Still, he soon confessed (never able to keep quiet for long) that he was herself a prisoner of the Combine. He took no pleasure from her current grotesque existence, and pleaded with us to end his life. Alyx believed that a quick death was more than Wallace Breen deserved, but for my part, I felt a modicum of pity and compassion. Out of Alyx ’s sight, I might have done something to hasten the grub’s demise before we proceeded.
Not far from where we had been detained by Dr. Breen, we found Judith Mossman being held in a Combine interrogation cell. Things were tense between Judith and Alyx, as might be imagined. Alyx blamed Judith for her father’s death…news of which, Judith was devastated to hear for the first time. Judith tried to convince Alyx that she had been a double agent serving the resistance all along, doing only what Eli had asked of her, even though she knew it meant he risked being seen by her peers–by all of us–as a traitor. I was convinced; Alyx less so. But from a pragmatic point of view, we depended on Dr. Mossman; for along with the Borealis coordinates, she possessed resonance keys which would be necessary to bring the liner fully into our plane of existence.
We skirmished with Combine soldiers protecting a Combine research post, then Dr. Mossman attuned the Borealis to precisely the frequencies needed to bring it into (brief) coherence. In the short time available to us, we scrambled aboard the ship, with an unknown number of Combine agents close behind. The ship cohered for only a short time, and then its oscillations resume. It was too late for our own military support, which arrived and joined the Combine forces in battle just as we rebounded between universes, once again unmoored.
What happened next is even harder to explain. Alyx Vance, Dr. Mossman and myself sought control of the ship–its power source, its control room, its navigation center. The liner’s history proved nonlinear. Years before, during the Combine invasion, various members of an earlier science team, working in the hull of a dry-docked liner situated at the Aperture Science Enrichment Center in Lake Huron, had assembled what they called the Bootstrap Device. If it worked as intended, it would emit a field large enough to surround the ship. This field would then itself travel instantaneously to any chosen destination without having to cover the intervening space. There was no need for entry or exit portals, or any other devices; it was entirely self-contained. Unfortunately, the device had never been tested. As the Combine pushed Earth into the Seven Hour War, the aliens seized control of our most important research facilities. The staff of the Borealis , with no other wish than to keep the ship out of Combine hands, acted in desperation. The switched on the field and flung the Borealis toward the most distant destination they could target: Antarctica. What they did not realize was that the Bootstrap Device travelled in time as well as space. Nor was it limited to one time or one location. The Borealis, and the moment of its activation, were stretched across space and time, between the nearly forgotten Lake Michigan of the Seven Hour War and the present day Antarctic; it was pulled taut as an elastic band, vibrating, except where at certain points along its length one could find still points, like the harmonic spots along a vibrating guitar string. One of these harmonics was where we boarded, but the string ran forward and back, in both time and space, and we were soon pulled in every direction ourselves.
Time grew confused. Looking from the bridge, we could see the drydocks of Aperture Science at the moment of teleportation, just as the Combine forces closed in from land, sea and air. At the same time, we could see the Antarctic wastelands, where our friends were fighting to make their way to the protean Borealis; and in addition, glimpses of other worlds, somewhere in the future perhaps, or even in the past. Alyx grew convinced we were seeing one of the Combine’s central staging areas for invading other worlds–such as our own. We meanwhile fought a running battle throughout the ship, pursued by Combine forces. We struggled to understand our stiuation, and to agree on our course of action. Could we alter the course of the Borealis? Should we run it aground in the Antarctic, giving our peers the chance to study it? Should we destroy it with all hands aboard, our own included? It was impossible to hold a coherent thought, given the baffling and paradoxical timeloops, which passed through the ship like bubbles. I felt I was going mad, that we all were, confronting myriad versions of ourselves, in that ship that was half ghost-ship, half nightmare funhouse.
What it came down to, at last, was a choice. Judith Mossman argued, reasonably, that we should save the Borealis and deliver it to the Resistance, that our intelligent peers might study and harness its power. But Alyx reminded me she had sworn she would honor her father’s demand that we destroy the ship. She hatched a plan to set the Borealis to self-destruct, while riding it into the heart of the Combine’s invasion nexus. Judith and Alyx argued. Judith overpowered Alyx and brought the Borealis area, preparing to shut off the Bootstrap Device and settle the ship on the ice. Then I heard a shot, and Judith fell. Alyx had decided for all of us, or her weapon had. With Dr. Mossman dead, we were committed to the suicide plunge. Grimly, Alyx and I armed the Borealis, creating a time-travelling missile, and steered it for the heart of the Combine’s command center.
At this point, as you will no doubt be unsurprised to hear, a Certain Sinister Figure appeared, in the form of that sneering trickster, the G-Man. For once he appeared not to me, but to Alyx Vance. Alyx had not seen the cryptical schoolmarm (no male equivalent) since childhood, but she recognized him instantly. “Come along with me now, we’ve places to do and things to be,” said the G-Man, and Alyx acquiesced. She followed the strange grey man out of the Borealis, out of our reality. For me, there was no convenient door held open; only a snicker and a sideways glance. I was left alone, riding the weaponized luxury liner into the heart of a Combine world. An immense light blazed. I caught a cosmic view of a brilliantly glittering Dyson sphere. The vastness of the Combine’s power, the futility of our struggle, blossomed briefly in my awareness. I saw everything. Mainly I saw how the Borealis, our most powerful weapon, would register as less than a fizzling matchhead as it blew itself apart. And what remained of me would be even less than that.
Just then, as you have surely already foreseen, the Vortigaunts parted their own checkered curtains of reality, reached in as they have on prior occasions, plucked me out, and set me aside. I barely got to see the fireworks begin.
And here we are. I spoke of my return to this shore. It has been a circuitous path to lands I once knew, and surprising to see how much the terrain has changed. Enough time has passed that few remember me, or what I was saying when last I spoke, or what precisely we hoped to accomplish. At this point, the resistance will have failed or succeeded, no thanks to me. Old friends have been silenced, or fallen by the wayside. I no longer know or recognize most members of the research team, though I believe the spirit of rebellion still persists. I expect you know better than I the appropriate course of action, and I leave you to it. Except no further correspondence from me regarding these matters; this is my final episode.
Yours in infinite finality,
Gordon Freeman, Ph.D.
First picture of SpaceX spacesuit. More in days to follow. Worth noting that this actually works (not a mockup). Already tested to double vacuum pressure. Was incredibly hard to balance esthetics and function. Easy to do either separately.
These are not, strictly speaking, “space suits.” Rather, they are more properly flight suits designed to be worn during the ride to space and again on the ride back down to Earth. They have a limited time in which they can operate in a full vacuum and are not intended for spacewalks.
The movie, set sometime in the near future, tells the story of Marjorie, an aging widow struggling with dementia. In this future world, people are able to purchase “primes,” which are computer programs that create an interactive, lifelike hologram of anybody the user chooses. Marjorie chooses her prime to take on the persona of a younger version of her late husband, Walter, who died 15 years earlier. The more the user interacts with the prime and talks about its human counterpart, the more humanlike the prime becomes.
It is officially. Android O will be named Oreo.
the court: The purpose of jury selection is to ensure fairness and impartiality in this case. If you think that you could not be fair and impartial, it is your duty to tell me. All right. Juror Number 1.
juror no. 1: I’m aware of the defendant and I hate him.
benjamin brafman: I’m sorry.
juror no. 1: I think he’s a greedy little man.
the court: Jurors are obligated to decide the case based only on the evidence. Do you agree?
juror no. 1: I don’t know if I could. I wouldn’t want me on this jury.
the court: Juror Number 1 is excused. Juror Number 18.
juror no. 18: Both of my parents are on prescriptions that have gone up over the past few months, so much that they can’t afford their drugs. I have several friends who have H.I.V. or AIDS who, again, can’t afford the prescription drugs that they were able to afford.
the court: These charges don’t concern drug pricing. Could you decide this case based only on the evidence —
juror no. 18: No. No.
the court: — presented at this trial and put aside anything you might have heard in the media?
juror no. 18: No. No.
the court: Sir, we are going to excuse you from this panel. Juror Number 25, come forward, please.
juror no. 25: This is the price-gouging, right, of drugs?
the court: This case has nothing to do with drugs.
juror no. 25: My kids use those drugs.
the court: As I said, the case does not concern anything that you might have read or heard about the pricing of certain pharmaceuticals.
juror no. 25: It affects my opinion of him.
the court: I am going to excuse you. Juror Number 40. Come on up, sir.
juror no. 40: I’m taking prescription medication. I would be upset if it went up by a thousand percent. I saw the testimony on TV to Congress and I saw his face on the news last night. By the time I came in and sat down and he turned around, I felt immediately I was biased.
the court: Sir, we are going to excuse you. Juror Number 47, please come up.
juror no. 47: He’s the most hated man in America. In my opinion, he equates with Bernie Madoff with the drugs for pregnant women going from $15 to $750. My parents are in their eighties. They’re struggling to pay for their medication. My mother was telling me yesterday how my father’s cancer drug is $9,000 a month.
the court: The case is going to come before you on evidence that you must consider fairly and with an open mind.
juror no. 47: I would find that difficult.
the court: And that’s based on your parents’ experience with medication?
juror no. 47: It’s based on people working very hard for their money. He defrauded his company and his investors, and that’s not right.
the court: Ma’am, we’re going to excuse you. Juror Number 52, how are you?
juror no. 52: When I walked in here today I looked at him, and in my head, that’s a snake — not knowing who he was. I just walked in and looked right at him and that’s a snake.
brafman: So much for the presumption of innocence.
the court: We will excuse Juror Number 52. Juror Number 67?
juror no. 67: The fact that he raised the price of that AIDS medication, like, such an amount of money disgusts me. I don’t think I’ll ever be able to forget that. Who does that, puts profit and self-interest ahead of anything else? So it’s not a far stretch that he could do what he’s accused of.
the court: Please go to the jury room and tell them you have been excused. Juror Number 70.
juror no. 70: I have total disdain for the man. When you go back to how he was able to put so many children —
the court: You have negative feelings?
juror no. 70: Very.
the court: Would those feelings prevent you from being fair to both sides in this case?
juror no. 70: I can be fair to one side but not the other.
the court: We will excuse you from this jury. Juror Number 77.
juror no. 77: From everything I’ve seen on the news, everything I’ve read, I believe the defendant is the face of corporate greed in America.
brafman: We would object.
juror no. 77: You’d have to convince me he was innocent rather than guilty.
the court: I will excuse this juror. Hello, Juror Number 125.
juror no. 125: I’ve read extensively about Martin’s shameful past and his ripping off sick people and it hits close to me. I have a mother with epilepsy, a grandmother with Alzheimer’s, and a brother with multiple sclerosis. I think somebody that’s dealt in those things deserves to go to jail.
the court: Just to be clear, he’s not being charged with anything relating to the pricing of pharmaceuticals.
juror no. 125: I understand that, but I already sense the man is guilty.
the court: Well, I’m going to excuse you. Juror Number 144, tell us what you have heard.
juror no. 144: I heard through the news of how the defendant changed the price of a pill by up-selling it. I heard he bought an album from the Wu-Tang Clan for a million dollars.
the court: The question is, have you heard anything that would affect your ability to decide this case with an open mind. Can you do that?
juror no. 144: I don’t think I can because he kind of looks like a dick.
the court: You are Juror Number 144 and we will excuse you. Come forward, Juror Number 155.
juror no. 155: I have read a lot of articles about the case. I think he is as guilty as they come.
the court: Then I will excuse you from this case. Juror Number 10, please come forward.
juror no. 10: The only thing I’d be impartial about is what prison this guy goes to.
the court: Okay. We will excuse you. Juror 28, do you need to be heard?
juror no. 28: I don’t like this person at all. I just can’t understand why he would be so stupid as to take an antibiotic which H.I.V. people need and jack it up five thousand percent. I would honestly, like, seriously like to go over there —
the court: Sir, thank you.
juror no. 28: Is he stupid or greedy? I can’t understand.
the court: We will excuse you. Juror 41, are you coming up?
juror no. 41: I was looking yesterday in the newspaper and I saw the defendant. There was something about him. I can’t be fair. There was something that didn’t look right.
the court: All right. I’m going to excuse you. Juror Number 59, come on up.
juror no. 59: Your Honor, totally he is guilty and in no way can I let him slide out of anything because —
the court: Okay. Is that your attitude toward anyone charged with a crime who has not been proven guilty?
juror no. 59: It’s my attitude toward his entire demeanor, what he has done to people.
the court: All right. We are going to excuse you, sir.
juror no. 59: And he disrespected the Wu-Tang Clan.
NL-1331E is coming back to Europe to continue its exploratory mission during the 13 Magnus Reawakens anomaly series. It has been confirmed that NL1331 will have a new updated Scanner badge, collectible ingress item cards card will be given out, and select Ingress Official Niantic Gear will be available for sale through this site only. In each city that we visit on this tour NL-1331 will be doing a Klue dead drop. We have lots of other surprises including special swag hidden in many of the readiness kits. NL-1331 will post more details about that in the future. A official NIA Meetup with Niantic’s Ethan Lepouttre is happening on the 19th of September, and you’re invited to take part in this Cross Faction meet-up. TBD is our meeting spot for an evening of fun.
Then you block it. Can’t do it completely block it since other people are using it so it will ble locally:
sudo nano /etc/hosts
Paste this in. Reboot might be needed. You will need the IPv6 also.
#facebook 127.0.0.1 api.ak.facebook.com 127.0.0.1 api.connect.facebook.com 127.0.0.1 api.facebook.com 127.0.0.1 app.facebook.com 127.0.0.1 apps.facebook.com 127.0.0.1 ar-ar.facebook.com 127.0.0.1 badge.facebook.com 127.0.0.1 blog.facebook.com 127.0.0.1 connect.facebook.com 127.0.0.1 connect.facebook.net 127.0.0.1 de-de.facebook.com 127.0.0.1 developers.facebook.com 127.0.0.1 es-la.facebook.com 127.0.0.1 external.ak.fbcdn.net 127.0.0.1 facebook.com 127.0.0.1 facebook.de 127.0.0.1 facebook.fr 127.0.0.1 fb.me 127.0.0.1 fbcdn.net 127.0.0.1 fr-fr.facebook.com 127.0.0.1 hi-in.facebook.com 127.0.0.1 it-it.facebook.com 127.0.0.1 ja-jp.facebook.com 127.0.0.1 login.facebook.com 127.0.0.1 profile.ak.fbcdn.net 127.0.0.1 pt-br.facebook.com 127.0.0.1 ssl.connect.facebook.com 127.0.0.1 static.ak.connect.facebook.com 127.0.0.1 static.ak.fbcdn.net 127.0.0.1 www.facebook.com 127.0.0.1 www.facebook.de 127.0.0.1 www.facebook.fr 127.0.0.1 zh-cn.facebook.com #Facebook IPv6 #fe80::1%lo0 localhost ::1 api.ak.facebook.com ::1 api.connect.facebook.com ::1 api.facebook.com ::1 app.facebook.com ::1 apps.facebook.com ::1 ar-ar.facebook.com ::1 badge.facebook.com ::1 blog.facebook.com ::1 connect.facebook.com ::1 connect.facebook.net ::1 de-de.facebook.com ::1 developers.facebook.com ::1 es-la.facebook.com ::1 external.ak.fbcdn.net ::1 facebook.com ::1 facebook.de ::1 facebook.fr ::1 fb.me ::1 fbcdn.net ::1 fr-fr.facebook.com ::1 hi-in.facebook.com ::1 it-it.facebook.com ::1 ja-jp.facebook.com ::1 login.facebook.com ::1 profile.ak.fbcdn.net ::1 pt-br.facebook.com ::1 ssl.connect.facebook.com ::1 static.ak.connect.facebook.com ::1 static.ak.fbcdn.net ::1 www.facebook.com ::1 www.facebook.de ::1 www.facebook.fr ::1 zh-cn.facebook.com