Peace in the Taiwan Strait and the island's independence are incompatible, the Beijing government warned on Monday, APA reports citing Euro News.
Later in the day, China announced it had "successfully" completed three-day military drills focused on "patrolling and combat readiness" around Taiwan Island, according to a note from spokesman Shi Yi.
The fiery rhetoric comes on the third day of military exercises in this area, amid rising tensions between China and the US.
"Taiwan independence and peace and stability in the Taiwan Strait are mutually exclusive," Foreign Ministry spokesperson Wang Wenbin said during a regular briefing.
"If we want to safeguard peace and stability in the Taiwan Strait, we must firmly oppose any form of separatism for Taiwanese independence," he added.
The show of force from China comes after Taiwanese President Tsai Ing-wen met with US House Speaker McCarthy last week in Simi Valley, California.
Washington has pledged to defend Taiwan in the event of a Chinese invasion.