HONG KONG (AP) - Videos of hundreds protesting in Shanghai started to appear on WeChat Saturday night. Showing chants about removing COVID-19 restrictions and demanding freedom, they would only stay up for only minutes before being censored.
Elliot Wang, a 26-year-old in Beijing, was amazed.
"I started refreshing constantly, and saving videos, and taking screenshots of what I could before it got censored," said Wang, who only agreed to be quoted using his English name, in fear of government retaliation, . "A lot of my friends were sharing the videos of the protests in Shanghai. I shared them too, but they would get taken down quickly."
That Wang was able to glimpse the extraordinary outpouring of grievances highlights the cat-and-mouse game that goes on between millions of Chinese internet users and the country's gargantuan censorship machine.
Chinese authorities maintain a tight grip on the country's internet via a complex, multi-layered censorship operation that blocks access to almost all foreign news and social media, and blocks topics and keywords considered politically sensitive or detrimental to the Chinese Communist Party's rule. Videos of or calls to protest are usually deleted immediately.
But images of protests began to spread on WeChat, a ubiquitous Chinese social networking platform used by over 1 billion, in the wake of a deadly fire in the western city of Urumqi Friday. Many suspected that lockdown measures prevented residents from escaping the flames, something the government denies.
The sheer number of unhappy Chinese users who took to the Chinese internet to express their frustration, together with the methods they used to evade censors led to a brief period of time where government censors were overwhelmed, according to Han Rongbin, an associate professor at the University of Georgia's Public and International Affairs department.
"It takes censors some time to study what is happening and to add that to their portfolio in terms of censorship, so it's a learning process for the government on how to conduct censorship effectively," said Han.
In 2020, the death from COVID-19 of Li Wenliang, a doctor who was arrested for spreading rumors following an attempt to alert others about a "SARS-like" virus, sparked widespread outrage and an outpouring of anger against the Chinese censorship system. Users posted criticism for hours before censors moved to delete posts.
As censors took down posts related to the fire, Chinese internet users often used humor and metaphor to spread critical messages.
"Chinese netizens have always been very creative because every idea used successfully once will be discovered by censors the next time," said Liu Lipeng, a censor-turned-critic of China's censorship practices.
Chinese users started posting images of blank sheets of white paper, said Liu, in a silent reminder of words they weren't allowed to post.
Others posted sarcastic messages like "Good good good sure sure sure right right right yes yes yes," or used Chinese homonyms to evoke calls for President Xi Jinping to resign, such as "shrimp moss," which sounds like the words for "step down" as well as "banana peel", which has the same initials as Chinese President Xi Jinping.
But within days, censors moved to contain images of white paper. They would have used a range of tools, said Chauncey Jung, a policy analyst who previously worked for several Chinese internet companies based in Beijing.
Most content censorship is not done by the state, Jung said, but outsourced to content moderation operations at private social media platforms, who use a mix of human and AI. Some censored posts are not deleted, but may be made visible only to the author, or removed from search results. In some cases, posts with sensitive key phrases may be published after review.
A search on Weibo Thursday for the term "white paper" turned up mostly posts that were critical of the protests, with no images of a single sheet of blank paper, or of people holding white paper at protests.
It's possible to access the global internet from China by using technologies such as virtual private networks that disguise internet traffic, but these systems are illegal and many Chinese internet users access only the domestic internet. Wang does not use a VPN.
"I think I can say for all the mainlanders in my generation that we are really excited," said Wang. "But we're also really disappointed because we can't do anything... They just keep censoring, keep deleting, and even releasing fake accounts to praise the cops."
But the system works well enough to stop many users from ever seeing them. When protests broke out across China over the weekend, Carmen Ou, who lives in Beijing, initially didn't notice.
Ou learned of the protests only later, after using a VPN service to access Instagram.
"I tried looking at my feed on WeChat, but there was no mention of any protests," she said. "If not for a VPN and access to Instagram, I might not have found out that such a monumental event had taken place."
Han, the international affairs professor, said that censorship "doesn't have to be perfect to be effective"
"Censorship might be functioning to prevent a big enough size of the population from accessing the critical information to be mobilized," he said.
China's opaque approach to tamping down the spread of online dissent also makes it difficult to distinguish government campaigns from ordinary spam.
Searching Twitter using the Chinese words for Shanghai or other Chinese cities reveals protest videos, but also also a near-constant flood of new posts showing racy photos of young women. Some researchers proposed that a state-backed campaign could be seeking to drown out news of the protests with "not safe for work" content.
A preliminary analysis by the Stanford Internet Observatory found lots of spam but no "compelling evidence" that it was specifically intended to suppress information or dissent, said Stanford data architect David Thiel.
"I'd be skeptical of anyone claiming clear evidence of government attribution," Thiel said in an email.
Twitter searches for more specific protest-related terms, such as "Urumqi Middle Road, Shanghai," produced mainly posts related to the protests.
Israeli data analysis firm Cyabra and another research group that shared analysis with the AP said it was hard to distinguish between a deliberate attempt to drown out protest information sought by the Chinese diaspora and a run-of-the-mill commercial spam campaign.
Twitter didn't respond to a request for comment. It hasn't answered media inquiries since billionaire Elon Musk took over the platform in late October and cut back much of its workforce, including many of those tasked with moderating spam and other content. Musk often tweets about how he's enacting or enforcing new Twitter content rules but hasn't commented on the recent protests in China.
AP Business Writer Kelvin Chan in London and AP Technology Writer Matt O'Brien in Providence, Rhode Island contributed to this story.
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