【明報專訊】Tensions run high in the Taiwan Strait as US House Speaker Nancy Pelosi, the third highest ranking figure in the US government, has arrived in Taipei by special plane for a visit, pushing Sino-US relations towards the biggest crisis since the end of the Korean War. Foreign Minister Wang Yi accused the US of breaking its word on the issue of Taiwan. Despite the tension amid the frequent military manoeuvres or drills by China and the US in the region in recent days, apparently neither side wants to go to war simply because of Pelosi's political show. However, Pelosi's visit is obviously an act of challenging China's core interest of territorial sovereignty. In order to suppress the flame of Taiwan independence, Beijing will not let things slide. Pelosi's visit to Taiwan is only a prelude to the first major crisis between the two countries in the New Cold War era. The People's Liberation Army (PLA) has announced military drills for four consecutive days in six zones encircling Taiwan, as if laying siege to the island. It is hard to predict how Washington will react. If the situation worsens, it can turn into a 21st century version of the Cuban Missile Crisis.