An Fengshan, spokesman for the State Council Taiwan Affairs Office, answers reporters' questions at a press conference. (File Photo)

The Chinese mainland resolutely opposed the U.S.-Taiwan travel bill passed by the U.S. Senate, a spokesperson said Friday.

The U.S. Senate on Wednesday passed the Taiwan Travel Act, which aims to encourage high-level exchanges between the United States and Taiwan. The U.S. House of Representatives passed the bill in January.

"It seriously violates the one-China principle and the three Sino-U.S. joint communiques, and we are firmly against the act," said An Fengshan, spokesperson for the Taiwan Affairs Office of the State Council.

"We sternly warn Taiwan not to rely on foreigners to build you up, or it will only draw fire against yourself," An said.