The Chinese mainland plays a leading role in controlling the situation in the Taiwan Strait, and its justified countermeasures against "Taiwan independence" make the separatists know loud and clear its determination, a Chinese mainland expert said.

Li Zhenguang, a professor of Taiwan studies at Beijing Union University, made the remarks at a seminar held by the Research Center for Cross-Strait Relations of the Renmin University of China, on Sunday on the changes in Taiwan's political situation.

Li said that "playing a key role in controlling the situation in the Taiwan Strait, the mainland has actively responded to challenges over recent years, achieving positive effects".

In face of collusion between the United States and Taiwan and provocations from the Lai Ching-te's administration, the mainland has responded resolutely, demonstrating strong control capabilities, and deterring foreign anti-China forces and secessionist forces in Taiwan, he said.

Regarding the abrupt actions and statements of Lai since taking office in May, the mainland has responded with justified and powerful measures, Li said.

"These made him clearly understand the mainland's determination, instilling a sense of fear regarding the mainland's red lines", he said.

On the other hand, the mainland is actively shaping a new framework for cross-Strait relations according to its own planning steps, showcasing significant capacity for shaping the situation, he added.

Yang Jinghua, a deputy researcher at the Taiwan Research Institute of the Chinese Academy of Social Sciences, said that Lai's "Taiwan independence" attempts and political calculations were bound to disrupt the peaceful and stable situation in the Strait.

"Nevertheless, these actions would not affect the mainland's strong strategic resolve and confidence in promoting integration and reunification, as well as its determination, confidence, and capability to thwart any separatist schemes," Yang said.