Chairman Mao is alleged to have purged hundreds of thousands through his 'Cultural Revolution.' That was over half a century ago. Xi Jinping may not have such plans, but he seems to be hell bent upon purging the Chinese youth from getting culturally influenced by 'Western' concepts such as fandom and excessive celeb madness.

The censor police are on overdrive. Chinese celebrities haven't been spared either. The crackdown has taken various forms. From cracking down on songs with "illegal content" in karaoke bars to ranking lists of celebrities being removed from online to even asking Chinese celebs to tone down their presence online. [https://www.npr.org/2021/08/11/1026718505/china-karaoke-blacklist-banned-songs]
China's cyberspace regulator has brought in various rules to rein-in "unhealthy online fandom culture." [https://www.globaltimes.cn/page/202109/1233290.shtml] Some of the social media accounts have been taken down in a broad sweep, accusing them of being "harmful for maintaining social order, including those that endanger national sovereignty and territorial integrity, instigate ethnic hatred and discrimination, insult and slander martyrs, and incite illegal gatherings."

Many see a pattern emerging from the latest move, which began with the fans of Chinese-Canadian singer Kris Wu Yifan reportedly planning a "prison break" to "rescue" him when he was detained by Beijing police on alleged rape charges. Then came the suspension of many social accounts by K-pop fans on Weibo, the largest Chinese social media network.
The Cyberspace Administration of China (CAC) late last month asked all its offices across China to increase vigil against sites that spread "fan circle chaos" and make entertainment-related platforms "perform their duties" and stem the tide of hero worship. [https://www.globaltimes.cn/page/202108/1232642.shtml]

The power of online groups to organise themselves is unnerving the government, experts say.

These steps come on the heels of the government coming down heavily on the tech industry over privacy issues, online gaming over excessive exposure of children. Xi probably wants to control most aspects of Chinese citizens' life including who their celebrities will be and how much affection they can express towards their favourite stars.

Read more:

The big crackdown:
https://www.ft.com/content/ceb9b60e-c78d-4b1f-9fa0-210a1a099671

What govt is telling celebs in China
https://www.theguardian.com/world/2021/sep/08/chinese-celebrities-warned-over-morality-in-cultural-crackdown