Chinese Foreign Minister Wang Yi vowed Wednesday to punish those who offend Beijing, state media reported, as the country seethes over US House Speaker Nancy Pelosi's visit to Taiwan, according to AFP.

"This is a complete farce. The United States is violating China's sovereignty under the guise of so-called 'democracy'... those who offend China will be punished," Wang said on the sidelines of a meeting of the Association of Southeast Asian Nations (ASEAN) in Phnom Penh.