More than 40 Chinese warplanes flew over Taiwan’s air defence zone on Saturday, as part of military drills that Taiwan called “irrational and provocative”.
About 26 Chinese aircraft crossed the median line of the Taiwan Strait, Taiwan’s ministry of defence said.
It said Beijing was trying to influence Taiwan’s upcoming election.
China said the drills would test its forces’ ability to fight in “combat conditions”, state media reported.
The exercises would serve as a “stern warning to the collusion of ‘Taiwan independence’ separatists with foreign elements and their provocations”, he added.
Mr Lai, a frontrunner in Taiwan’s upcoming presidential election in January, was visiting the US on a trip to Paraguay.
China said Mr Lai was a “troublemaker” and that it would take “resolute measures” to “safeguard national sovereignty and territorial integrity”.
Despite China’s claim to sovereignty over the island, Taiwan governs itself. It described China’s military exercise as “irrational and provocative behaviour”.
Taiwan said it would dispatch “appropriate forces” to respond “with practical actions” – adding that the national army was using reconnaissance methods to “strictly control” the situation.
“Conducting a military exercise this time under a pretext not only does not help the peace and stability in the Taiwan Strait, but also highlights (China’s) militaristic mentality and confirms the hegemonic nature of its military expansion,” Taiwan’s defence ministry said.