BEIJING (Reuters) - The United State's passage of a bill that aims to restrict business with Wuxi AppTec, BGI and other biotech firms was a "discriminatory" measure against Chinese companies, China's foreign ministry said on Tuesday.

China urges the U.S. to respect market principles and trade rules, stop pushing forward the bill and misusing all kinds of excuses to suppress Chinese companies, ministry spokesperson Mao Ning said at a press briefing.