PLA's drills around Taiwan

"Strait Thunder-2025A", that's the code name of the ongoing military exercises conducted by the Chinese People's Liberation Army in the middle and southern areas of the Taiwan Strait. The PLA Eastern Theater Command made the announcement hours ago on Wednesday, a day after launching joint military exercises around the island on Tuesday. China's State Council Taiwan Affairs Office said on Tuesday that the drills are a resolute punishment for Lai Ching-te authorities' blatant "Taiwan independence" provocations. What triggered the latest reactions from Beijing? What has Lai Ching-te said or done since he took office last May? How will the drills impact the situation across the Strait?