Davyd Booth (C), a violinist and second keyboard player with The Philadelphia Orchestra, plays violin during a rehearsal for a collaborative concert with Chinese musicians in Philadelphia, the United States, Jan. 28, 2019. More than 45 years after his first trip to China, Davyd Booth, a 69-year-old U.S. musician, still clearly remembered his feeling at the time. (Xinhua/Wang Ying)