An Fengshan, spokesperson for the Taiwan Affairs Office of the State Council, delivers a speech at a press conference on March 18, 2018 

China on Sunday repeated its warning to the US over the Taiwan Travel Act, saying it "had sent a gravely wrong signal to Taiwan independence separatists".

"Once again, I would like to sternly warn Taiwan that relying on foreigners to draw support will backfire”, said An Fengshan, spokesperson for the Taiwan Affairs Office of the State Council, at a press conference on Sunday.

Upholding the stance to resolutely oppose the bill, China has announced a series of warnings to the US since US President Donald Trump signed the bill Friday.

"As has been pointed out many times by China, the relevant clauses of the act, though not legally binding, severely violate the one-China principle and the three joint communiques between China and the United States," said Lu Kang, spokesperson of the Foreign Ministry on Saturday.

Lu Kang, spokesperson of the Foreign Ministry, delivers a speech on March 17, 2018 

The Three Joint Communiqués signed in 1972, 1978 and 1982 contain US commitments on “respecting each other's national sovereignty and territorial integrity”.

"Taiwan is a part of China and any issue about Taiwan is part of China’s internal affairs," said Wu Qian, spokesperson for the Ministry of National Defense. 

Wu stressed that the bill had interfered in the internal affairs of China and damaged relations between the two countries' militaries.

China has lodged representations with the United States over the Taiwan-related bill, said Lu.

"We urge the US side to correct its mistake, stop pursuing official ties or improving its relations with Taiwan in any substantive way, and handle Taiwan-related issues properly and cautiously so as to avoid causing damage to China-US relations and cross-Strait peace and stability," Lu added.

Screenshot of the website of Chinese Embassy in the US 

The Chinese Embassy in Washington Friday denounced the US both on Facebook and its official website, expressing strong disagreement and firm opposition to the bill.

The US-Taiwan travel bill encourages visits between the United States and the island at all levels.