Concerns have been raised over the reported abduction of a local deputy to the Chinese People's Political Consultative Conference (CPPCC) in Shanghai 10 days ago.
Liu Chi-keung, a 64-year-old businessman, was said to have been abducted, together with his aide, by six or seven men at Shanghai airport.
Mr Liu, who had gone to Shanghai on a short business trip, was reportedly taken by the group to Tianjin, where he was being kept under house arrest at a hotel associated with the People's Liberation Army.
He is a specially invited deputy to the CPPCC and a member of the 424-member selection assembly to pick Hong Kong's 36 deputies to the National People's Congress.
The selection process will begin at the end of next week.
Mr Liu is married, but his wife is believed to be in the United States.
