The summary on Wikipedia shows the uncertainty surrounding Tank Man:
[quote=“Wikipedia”]Little is publicly known of the man’s identity. Shortly after the incident, British tabloid the Sunday Express named him as Wang Weilin, a 19-year-old student; however, the veracity of this claim is dubious.
There are several conflicting stories about what happened to him after the demonstration. In a speech to the President’s Club in 1999, Bruce Herschensohn — former deputy special assistant to President of the United States Richard Nixon — reported that he was executed 14 days later; other sources say he was killed by firing squad a few months after the Tiananmen Square protests. In Red China Blues: My Long March from Mao to Now, Jan Wong writes that the man is still alive and in hiding in mainland China.
An eyewitness account of the event published in October 2005 by Charlie Cole, a contract photographer for Newsweek magazine at the time, states that the man was arrested on the spot by the Public Security Bureau.
The People’s Republic of China government made few statements about the incident or the person involved. In a 1992 interview with Barbara Walters, then-Communist Party General Secretary Jiang Zemin was asked what became of the man. Jiang replied “I think never killed [sic].”
A recent article in the Hong Kong Apple Daily states that Wang is now residing in Taiwan.[/quote]
I think that if the people who dragged him away were secret police then in the climate of the time he would have been quickly disposed of. On the other hand if they were just concerned onlookers then the prognosis is a little brighter, but I would be very surprised if he is still alive.