The Chinese People's Liberation Army (PLA) Eastern Command tracked and monitored two U.S. ships that passed through the Taiwan Strait from Monday to Wednesday and maintained vigilance throughout the process.

The passage of a U.S. destroyer and a marine survey ship was effectively handled by the navy and air force of the PLA Eastern Command, according to Li Xi, a spokesperson for the command on Wednesday.

Li said the U.S. action has sent wrong signals and heightened security risks.

"The armed forces of the command will stay on high alert at all times to firmly safeguard national sovereignty and security, and maintain regional peace and stability," Li said.