Guests try the costumes of Peking Opera on the sidelines of the Annual Meeting of the New Champions 2019, also known as Summer Davos, in Dalian, northeast China's Liaoning Province, July 1, 2019. Guests of the Summer Davos, which is held here from July 1 to 3, were invited to experience the art of Peking Opera on Monday. (Xinhua/Pan Yulong)