Shen Yang---No one has ever heard from Sun Hai Yang since Jan 2009.
Boxun had arranged two visits to Sun's residence but still failed to reach him.
According to an insider, it is confirmed that Sun had been arrested last year. For nearly a year, details regarding Sun's current condition and why he is in custody are still mysteries.
Before being detained, Sun had reported for Boxun by using his real name.  He also accepted phone interview called "Hai Yang Shuo Shi" at Radio Taiwan International.
Full article in Chinese at:
http://news.boxun.com/news/gb/china/2010/01/201001122337.shtml

Boxun update on Jan. 23, 2010: Sun was put in Laojiao in Jan. 2009, his Laojiao term will end by October 2010. LaoJiao is a practice in China that government can send people to labor camp (similar to prison) without going through legal process (no court, no trial).