The United States is violating the principles of market economy and international trade rules in considering a ban on Chinese citizens buying property in the US, the Chinese foreign ministry says.

China’s threats of military action against Taiwan are “absolutely not an option” and will only push the two sides "further from each other,” Taiwanese President Tsai Ing-wen said on Monday.

China has lodged “stern representations” with Washington after US President Joe Biden said American forces would defend Taiwan in the event of a Chinese invasion.