Property tycoon Cao Tian found out the hard way that a week is a long time in politics.
After announcing online his intention to run for mayor of Zhengzhou, the multimillionaire went into self-imposed hiding after his postings attracted 'special attention' from the authorities.
Cao publicised his intention to run for mayor of the capital of Henan province last month, one of several independent candidates to emerge on the internet.
Then he went silent, changing his mobile number frequently and refusing to talk to any media.
Ten days after his announcement, Cao's home and office were visited by police. He revealed via a friend's Weibo account that Zhengzhou authorities - including the police and tax and land resources officials - had launched an in-depth investigation into his company and himself.
Cao, 43, winner of a 'top 10 influential citizens in Henan' award, is known for his outspoken views.
He once wrote that whenever people were affected by forceful home demolition, the officials responsible should be marched to the prosecutors for punishment and even subjected to criminal charges.