Beijing has given only limited information concerning the hundreds of political prisoners jailed after the Tiananmen Square crackdown. The former Assistant Secretary of State for Human Rights. Richard Schifter. has recently stated that the Foreign Ministry makes a commitment on human rights and that someone else reneges on it. Secretary Baker was promised by Chinese leaders in November that they would grant visas to about 20 dissidents. but only 2 have been permitted to leave. Secretary Baker was assured that China would stop exporting prison made goods to the United States but in the same month of that assurance the Chinese were caught shipping diesel engines made with prison labor. Mr.