China has launched a PR war on Western brands critical of rights abuses in Xinjiang, with celebrities severing ties with Nike.
Clothing firm H&M is facing a customer boycott and Burberry has been dumped from a deal with a gaming giant.
At least one million Uighurs and other mostly Muslim minorities have been held in camps in Xinjiang, according to right groups, where authorities are also accused of forcibly sterilising women and imposing forced labour.
It is one of the world's top cotton-producing regions feeding many western garment brands with textiles.
But several firms have tried to put distance between their brands and Xinjiang cotton producers since the allegations emerged.
That has enraged China, which denies any abuses, insisting labour camps are in fact training programmes and work schemes have helped stamp out extremism and raise incomes.
Today, celebrities, tech brands and state media, aided by outrage on China's tightly-controlled social media, piled in on several global fashion brands, as China's vast consumer market was mobilised.
"Chinese people will not allow some foreigners to eat China's rice while smashing its bowls," foreign ministry spokeswoman Hua Chunying told reporters in Beijing.
"The Chinese market is here ... we open our hearts to welcome foreign companies. But we oppose malicious attacks on China based on rumours and lies, and harm to China's interests."
Chinese TV stars Wang Yibo and Tan Songyun said they would end all promotional partnerships with Nike, after a year-old company statement was regurgitated online noting it was "very concerned" by the allegations of forced labour.
Ms Tan's manager said she "resolutely opposes any bad behaviour of smearing and making rumours about China", with Mr Wang's agent releasing a statement saying "the country's dignity is not to be violated".
Gaming giant Tencent pulled a new 'skin' project linked with Burberry on avatars in the Glory of Kings game.
Swedish clothing giant H&M's products vanished from shopping sites in apparent retaliation for its decision to no longer source cotton from Xinjiang.
Global brands are often consumed by PR crises in China after touching politically-sensitive subjects.
In 2019, the NBA was dropped by Chinese broadcasters after Houston Rockets general manager Daryl Morey tweeted a message of support for pro-democracy protesters in Hong Kong.
Both Nike and H&M's statements were made last year.
But the online outcry suddenly spiked this week after Western countries joined forces to sanction several key officials from Xinjiang over alleged rights abuses.
An outraged China struck back with tit-for-tat sanctions as a war of words erupted between Beijing and several European nations.
State media yesterday lashed out against what they called H&M's "lies" and "ulterior motives", while a department store in Xinjiang's Urumqi city demanded an apology from the company in a statement.
The Global Times said H&M, which counts China as its fourth largest market, had been "suicidal" in its remarks, as it evaporated from Chinese shopping apps.
"This is definitely not some kind of nationalism, it is plain patriotism," said Ms Hua.
"Any upright person will not tolerate some people in other countries with ulterior motives unscrupulously damaging their motherland's interests and dignity."
H&M China in a statement last night said it "does not represent any political position" and remains committed to long-term investment in China.
The Swedish retail giant's 2020 statement is no longer visible on its website.
Nike did not immediately respond to requests for comment.