Twenty-two fan accounts have been suspended by Chinese social media site Sina Weibo for what it called "irrational star-chasing behaviour".
They include fans of Korean pop band BTS who crowdfunded on the platform to customise an aeroplane for singer Park Ji-Min's 26th birthday.
Weibo accused one fan account of "illegal fundraising" for the stunt.
In a statement, the company said it "firmly opposes such irrational star-chasing behaviour and will deal with it seriously".
It also pledged to "purify" online discussions and "regulate community order" on its platform.
The BTS account was suspended from posting for 60 days. Other accounts supporting K-pop acts Blackpink, GOT7 and EXO - who have Chinese members - were given 30-day bans.
The move comes amid a wider clampdown on the entertainment industry in China, and fan culture in particular.
Last week, two government agencies published guidelines saying they would ban broadcasts by "vulgar internet celebrities" and "feminine-looking men" because they do not portray the values the country wants to promote.