By Nandita Bose and Stanley Widianto NUSA DUA, Indonesia (Reuters) -U.S. President Joe Biden and Chinese President Xi Jinping engaged in blunt talks over Taiwan and North Korea on Monday in a three-hour meeting aimed at preventing strained U.S.-China ties from spilling into a new Cold War. Amid simmering differences on human rights, Russia’s invasion of Ukraine, and support of domestic industry, the two leaders pledged more frequent communications. U.S. Secretary of State Antony Blinken will travel to Beijing for follow-up talks. “We’re going to compete vigorously. But I’m not looking for conf…