Colored lights illuminate downtown Taipei in Southeast China's Taiwan, March 28, 2017. (PHOTO / XINHUA)

BEIJING - Chinese foreign ministry spokesperson Wang Wenbin said on Thursday that China will act strongly to resolutely respond to US House Speaker Nancy Pelosi's planned trip to Taiwan and take countermeasures should the US side insist on making the visit.

If Speaker Pelosi visits Taiwan, it would seriously violate the one-China principle and the stipulations in the three China-US joint communiques and harm China's sovereignty and territorial integrity.

Wang Wenbin, Chinese foreign ministry spokesperson

The Chinese side has repeatedly stated its stern position on firmly opposing Pelosi's visit to Taiwan, Wang said at a daily press briefing, adding that the US Congress is part of the US government, and is supposed to strictly adhere to the US commitment on the Taiwan question.

ALSO READ: Beijing vows to take strong steps if Pelosi visits Taiwan

"If Speaker Pelosi visits Taiwan, it would seriously violate the one-China principle and the stipulations in the three China-US joint communiques and harm China's sovereignty and territorial integrity," Wang said.

Wang said it will have a severe negative impact on the political foundation of China-US relations, and send a gravely wrong signal to "Taiwan independence" separatist forces.

READ MORE: China urges US to revoke arms sales plan to Taiwan

"Should the US side insist on making the visit, China will act strongly to resolutely respond to it and take countermeasures. We mean what we say," Wang said.