China Monday released a 33-year-old dissident who was active in the pro-democracy movement in Shanghai and whose case was taken up by the U.S. Congress.

Yang Wei, a former student at the University of Arizona, walked from Ti Lan Qiao Prison in Shanghai today after serving one year of a two-year sentence.Fu Fenghao, an official at the Shanghai Foreign Affairs office, said because Yang spent about a year in custody before being sentenced, he was let out because of time served.

Yang was sentenced in December 1987 for "demagogical propoganda for counterrevolutionary ends."

He had been held without charges since January 1987 in connection with pro-democracy student demonstrations in Shanghai in 1986.