By Yimou Lee TAIPEI (Reuters) -China launched unprecedented live-fire military drills in six areas that ring Taiwan on Thursday, a day after a visit by U.S. House of Representatives Speaker Nancy Pelosi to the self-ruled island that Beijing regards as its sovereign territory. Soon after the scheduled start at 0400 GMT, China’s state broadcaster CCTV said the drills had begun and would end at 0400 GMT on Sunday. They would include live firing on the waters and in the airspace surrounding Taiwan, it said. Taiwan officials have said the drills violate United Nations rules, invade Taiwan’s territo…