GreatFire Newsletter - April, 2012

April was an eventful month in China. Here's a summary of the most important Internet censorship news that we detected.

No major changes after Internet outage on April 12

There was an extraordinary Internet outage in China on April 12. Many reported that all foreign websites were unaccessible for about two hours. Our data confirms that several websites that are otherwise not blocked were not accessible, but interestingly other foreign websites were still available. For more info on what happened, check out our answer on Quora. Some people suggested that the authorities were trying out a new version of the Great Firewall, which would be more restrictive than before. Our data does not support this claim. As you can see in the first graph below, there has not been any major change in the number of major websites that are blocked in China. Furthermore, the second graph shows that foreign websites were actually faster to access in April than during previous months.

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Showing Alexa Top 500 websites blocked 50% or more of the time, per month. Source.

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Showing average download speed of Alexa Top 500 websites not hosted in China, per month. Source.

Google Drive and the ongoing Google vs CCP battle

Google Drive was launched on April 24. Within three days, it was blocked in China. This is similar to Google Plus which was launched on June 28 last year, and confirmed to be blocked since July 4. It is likely that the Great Firewall has a special team dedicated to monitoring and blocking new Google services. They are probably keen not to repeat the mistake of Google Mail which was left unblocked and, meanwhile, switched over to encrypted communications only (meaning that email content can't be intercepted). The authorites would probably like to block it. The only reason we can see that they don't is that they're afraid of the reactions because so many (especially educated, big-city people) are already using it.

Curiously, was blocked on March 29 (and has been blocked before) but is not blocked. The latter redirects users in China to (note the HTTP, as in not encrypted). Much more importantly, the encrypted Hong Kong version of Google at remains unblocked. While not on by default, it does allow Chinese users to search for any of the hundreds of keywords that are otherwise blocked. was blocked on March 29 and has stayed that way, though the unencrypted version remains accessible ( The same thing happened to the encrypted version of Google Maps ( - the unencrypted version also remains (

Several previously unblocked keywords were blocked on Google Search. These include google: 九长老 - a reference to the nine members of the Politburo Standing Committee, google: 政变 - meaning coup d'état, google: 共匪 - meaning communist bandit, and google: 滤霸, 驴爸 which was unblocked again on April 27.

YouTube fully blocked again

The encrypted version of YouTube - - was accessible in China for several days in March. Since March 29, though, it has been fully blocked again, suggesting that the Great Firewall is now better at blocking encrypted websites. HTTPS makes online censorship more difficult in that intercepting network devices don't know what the web traffic is. So while a web request to can be blocked simply by detecting that the user is trying to access a blacklisted URL, a request to can only be hindered by either blocking the IP address of the server or by DNS poisoning the domain lookup. The former is difficult because IP addresses tend to change over time, and the latter is imperfect because it's decentralized and easier to get around than other forms of censorship. For example, the encrypted YouTube URL was tested eight times during April. Five different IP addresses were returned on the different test occasions. Only on three of the occasions was a completely different IP address returned (suggesting DNS Poisoning). On all eight test ocassions though, the website was blocked. This suggests that the Great Firewall is now either blocking ranges of IP addresses, or continuously monitoring changes in IP addresses and blocking them accordingly.

Blocked and unblocked on Sina Weibo

weibo: 王立军, the former Chongqing police chief who triggered the biggest political scandal in China in many years, was blocked on or before April 10 (but was not blocked on April 3). As part of the same scandal, weibo: heywood was blocked on or before April 14. weibo: 薄熙来 himself was blocked on or before April 10.

Other keywords were unblocked. weibo: 蔡赴朝, the name of a CCP politican, was unblocked on or before April 21. weibo: 女同 - lesbian - was unblocked on or before April 7.

You can lookup and test any keyword for censorship on Sina Weibo here. Also much recommended are BlockedOnWeibo, a blog which publishes frequent news on keywords blocked on Weibo, and WeiboScope, a database of deleted Weibo posts.

Other major Weibo news of April is that Sina is still avoiding fully implementing real-name registration requirements and that Sina as well as Tencent Weibo turned off commenting for three days starting on March 31.

Other notable changes

The English en.wikipedia: Huang_Qi entry (a currently imprisoned human-rights activist) was blocked all of April, and then unblocked again in early May. was inaccessible on a couple of occasions in April and is consistently very slow in China. was unblocked in March and stayed unblocked throughout April. was blocked on March 26 and has stayed blocked since. was blocked on April 4 and has stayed blocked since. - A Chinese-language wiki - was blocked on April 9 and has stayed blocked since. - a gaming website - was unblocked at the end of March and has stayed accessible since. - a campaign website - was partially blocked already in March and fully blocked throughout April. - a blog covering news in China - was blocked at the end of March and has stayed blocked since.

GreatFire announces

There are many ways to get around the Great Firewall of China: VPNs, proxies, Tor etc. Some of them cost money and some are free. They are all bound to be unreliable though because they depend on a server used to tunnel the web traffic in order to circumvent the censorship. If the IP address of the server being used is blocked, the service ceases to work. It can be fixed of course, by changing to another server, but meanwhile you may find yourself without any means of accessing blocked websites. Until now. is a circumvention tool that is very difficult to block. This is because it relies on email and not HTTP traffic. All you need to do is to send an email to and enter the URL of the website that you want to view as the email subject. Within a few seconds (sometimes longer) you will receive a PDF version of the website.

For example, create a new email with the subject and send it off to You will receive an updated PDF copy of that website - blocked in China - shortly thereafter.

It's not a perfect solution by any means. You can't log in to websites, such as Facebook, and you can't view videos. However, for those times when you simply want to view a blocked website and you have no other means, it's very convenient. All you need to remember is

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Wed, Mar 19, 2014

Bing Bests Baidu Censorship


Independent research from Xia Chu has shown that, in addition to non-China content, Bing censors a vast amount of content that is hosted inside China and which is not censored by China-based internet companies like Baidu. After communicating our issues with Microsoft, Bing removed certain censorship rules (kudos to Bing), but much work remains to be done.

We recently called for Microsoft to release its transparency report for Bing (as have others - full disclosure, Rebecca sits on our advisory board).  Microsoft has yet to respond to this request. But Xia’s independent research of Bing’s China censorship policy could be regarded as a de facto transparency report for the search engine.

In this thorough study, the results of which we have verified, Xia examined Bing's SERP (search engine results page) for over 30,000 sensitive and nonsensitive query terms, and launched these queries from both inside and outside of China. Comparing and examining these results, plus querying with special search operators, reveals unprecedented detail on Bing's China filtering practices.

The main findings from Xia’s research include:

  • Bing has a list of “forbidden” terms where no results are shown. 139 such terms have been identified.

  • Bing has a blacklist of websites that it never shows to China users. 329 such websites are identified. (5 have been lifted after our communication with Microsoft.)

Thu, Feb 13, 2014

Setting Bing's Broken Record Straight

We can also now trace complicit Bing Chinese censorship back to 2009 as highlighted by Nicholas Kristof. It looks like Microsoft has indeed changed its censorship mechanism after our research made headlines this week. But Bing is still seriously flawed on two fronts: its algorithm favors pro-Chinese government websites by default on all search terms in simplified Chinese and their front end mistakenly delivers explicit censorship of search results on some search terms for users from all over the world.

Wed, Feb 12, 2014

No error here: Microsoft deploying Chinese censorship on global scale

Microsoft says: “The results themselves are and were unaltered outside of China”. This is simply not true.

Tue, Feb 11, 2014

Bing practicing Chinese censorship globally

Our latest research indicates that Microsoft’s search engine Bing is censoring English and Chinese language search on its home page in order to exclude certain results. We have also noticed that Bing is practicing subtle censorship with search results. In both instances, Bing is filtering out links and stories that the Chinese authorities would deem damaging.

Thu, Jan 23, 2014

Massive blocking of foreign media in China

After Tuesday’s report Leaked Records Reveal Offshore Holdings of China’s Elite by ICIJ, China blocked a number of major newspaper websites. All websites below were blocked after publishing copies of the original report. They're all listed as the publishing partners for “Chinaleaks” stories on ICIJ's website. The Great Firewall rarely blocks non-Chinese websites. Many of them have published the Chinese version of the report which probably explains the unusual development.


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