TAIPEI—Chinese air force planes including 12 fighter jets entered Taiwan’s air defense identification zone for a second day on Sunday, Taiwan said, as tensions rise near the island just days into U.S. President Joe Biden’s new administration. The Chinese communist regime claims the self-ruled Taiwan as a part of its territory and has repeatedly threatened to use military force to bring the island under its fold. It has in the past few months increased military activity near the island. But Chinese regime’s activities over the weekend mark a ratcheting up with fighters and bombers being dispatched rather than reconnaissance aircraft as had generally been the case in recent weeks. After eight Chinese bomber planes and four fighter jets flew into Taiwan’s defense zone on Saturday, between mainland Taiwan and the Taiwan-controlled Pratas Islands in the South China Sea, a further 15 flew into the same air space on Sunday, Taiwan said. …