Any country that establishes relations with the Chinese Communists has to accept the principle that Taiwan is a part of China, so to recognize an independent Taiwan they would have to break ties with the mainland.
任何一國與中共建交，一定接受一個原則﹘﹘台灣是中國的一部分；當然，中國並不一定表示是中共，但「一個中國」的原則是接受的。在此情況，同時要承認獨立的台灣，也是辦不到的，除非先與中共斷交。