China always opposes U.S. suppression of Chinese companies under the pretext of national security, the Ministry of Commerce said Thursday.

Spokesperson He Yongqian made the remarks at a press conference in response to a question regarding the United States' probe into the Chinese router manufacturer TP-Link over national security concerns.

The U.S. side should be objective and rational when conducting the relevant investigation, rather than making groundless accusations on the presumption of guilt, said He.