Despite the media backlash and reports, Fan has yet to be formally charged by Chinese authorities.
For film executives in China, the disappearance of top celebrity Fan Bingbing (above) is a reminder of the perils of show business in the most-regulated major entertainment market in the world, where the Chinese government weighs in on everything from the appropriateness of costumes to the salaries of movie stars.
Numerous details thus far are remarkably similar to the situation surrounding notorious and controversial Chinese artist Ai Weiwei, who was similarly held on tax evasion charges following a number of encounters with the Chinese government.
The actress, alternately credited as Bingbing Fan, is known to USA audiences mainly from her role as Blink in X-Men: Days Of Future Past. An article in the state-run outlet Securities Daily last week suggested that Fan was "under control" and that she would "accept the legal decision".
According to Taiwan News, the Securities Daily report added that the actress had been jailed and that what it described as a scandal related to signing multiple contracts to avoid paying higher taxes was only the "tip of the iceberg".
Chinese actress Fan Bingbing is set to co-star in the upcoming thriller 355 alongside Jessica Chastain, Penelope Cruz and Lupita Nyong'o, but that's assuming they're able to locate her. Her name was also stripped out of publicity in China for the film Unbreakable Spirit, in which she co-stars with Bruce Willis, due to open next month.
Controversies surrounding Fan's sky-high pay rates and the prevalence of "yin-yang contracts" in China's entertainment industry were ignited earlier this year.
Rival Swisse, which was taken over by a Chinese company in 2016, signed Fan as a brand ambassador in September 2017.
The 36-year-old has been China's highest-paid actress since 2013, Forbes reported last year. She reportedly pulls in tens of millions of dollars for her acting roles, as well as several high-end endorsements and appearance fees.
The latest clue emerged Tuesday after a state-affiliated think tank and Beijing university ranked Fan dead last in their annual "Social Responsibility Report" - she earned a 0 out of 100 - citing her "negative social impact", among other things.
The report evaluated celebrities on three criteria - professional work, charitable work, and integrity - based on media reports over the past year.
The article did not offer any explanation for what crime she had reportedly committed, and it was later deleted from the internet.
Rumors have circulated online that Fan's low score may have resulted from the allegations of criminal activity against her.