Other reports have since emerged that Fan is on the hook technically for tax evasion. She was accused this year on social media of signing two copies of a film contract - a practice colloquially dubbed a "yin-yang" agreement, wherein the undervalued version is submitted to tax authorities.
Even as the Communist Party steps up its push to create a Chinese cultural juggernaut that competes with the United States in "soft power," it has become increasingly uncomfortable with the mass culture it has spawned.
In recent years, media regulators have cracked down on the reality TV industry for manufacturing child stars and warned producers against making shows that serve as "venues for displaying fame and wealth." Propaganda authorities started inserting short vignettes reminding audiences of China's "core socialist values" before screening feature films by the likes of Jackie Chan.
Last year, 100 top Chinese filmmakers and pop stars were summoned to study the Communist Party's 19th Party Congress and President Xi Jinping's political theory - a situation that online wags compared to locking Justin Bieber and Taylor Swift in a room and making them read and praise President Trump's book "The Art of the Deal."
If there's anyone who personifies China's celebrity culture, Fan is it. Since exploding onto the scene as a teenager in the late 1990s, Fan, now 36, has starred in a string of Chinese hits, culminating with a role in 2014's "X-Men: Days of Future Past." Her name is commonly associated with Chinese youths' newfound obsession with plastic surgery, and her aquiline nose and distinctive jaw line are said to be popular requests. Fan's face is everywhere on Chinese streets, hawking Cartier jewelry, Mercedes sedans and Louis Vuitton couture.
As her disappearance has dragged on in recent weeks, more rumors have surfaced that Fan is facing an acting ban - or even house arrest. Overseas censorship trackers have noted that social media posts and news reports about Fan's whereabouts have quickly been scrubbed.
Given the Chinese government's propensity for secrecy, there probably won't be any solid news until the matter is sorted out behind closed doors, Fan pays up for her rumored tax transgressions and makes a contrite statement to the public.