Before the US president signed off on the Taiwan travel bill, Beijing once again warned the US not to do so.

LU KANG CHINESE FOREIGN MINISTRY SPOKESMAN "I must once again state that the 'One China' principle is the political basis for U.S.- China relations. We urge the U.S. side to abide by the One China policy and its declaration to follow the China-U.S. 'Three Joint Communiques' and cease U.S.-Taiwan official exchanges and substantively increasing connections. The US must carefully deal with issues relating to Taiwan appropriately, so as to avoid seriously disrupting China-U.S. cooperation."