BEIJING (Reuters) -Premier Li Qiang will lead China's delegation at a G20 summit in New Delhi this weekend, China's foreign ministry said on Monday, indicating President Xi Jinping would not attend and scuppering chances of a meeting with U.S. President Joe Biden there. The Sept. 9-10 summit had been seen as a venue for a possible meeting between Xi and Biden, who has confirmed his attendance in New Delhi, following months of efforts by the two powers to stabilise ties frayed by trade and geopol