The thaw brought on by last week's release ofHarry Wuand First Lady Hillary Rodham Clinton's decision to attend a women's conference in China could result in a summit between President Clinton and Chinese President Jiang Zemin. Of course,there's a catch. The Chinese Foreign Ministry today suggested the two leaders might meet if the U.S. "honors its commitment on the question of Taiwan."As far as Beijing is concerned, Washington reneged on its promise to support "one China" when Clinton approved a U.S. visa for Taiwanese President Lee Teng-hui to visit Cornell last June. "For starters, this means no more trips to the U.S. for Lee," says deputy chief of correspondents Richard Hornik. "It also means no cabinet-level official visits to Taiwan. The Chinese government is very concerned about saving face on this issue. And the U.S. must comply with conditions relating to Taiwan if they want to do business with the Chinese."