FILE PHOTO-Xie Feng, China's new ambassador to the U.S., addresses the media as he arrives at JFK airport in New York City, U.S., May 23, 2023. REUTERS/Brendan McDermid/File Photo Acquire Licensing Rights BEIJING, Sept 28 (Reuters) - China's ambassador to the United States said the Biden administration could help restore fraught relations by starting with "practical" steps, such as renewing a decades-old pact on science and technology. Beijing and Washington have gradually resumed dialogue in recent months despite continued tension between the world's two largest economies over issues ranging from Taiwan to U.S. export curbs on chips to China. "We...