Artists perform at the opening concert of the World Economic Forum (WEF) in Davos, Switzerland, Jan. 20, 2020. The WEF Annual Meeting 2020 is scheduled to take place on Jan. 21-24 in Davos-Klosters in Switzerland. (Photos: Xinhua)

Artists perform at the opening concert of the World Economic Forum (WEF) in Davos, Switzerland, Jan. 20, 2020. The WEF Annual Meeting 2020 is scheduled to take place on Jan. 21-24 in Davos-Klosters in Switzerland.

Artists perform at the opening concert of the World Economic Forum (WEF) in Davos, Switzerland, Jan. 20, 2020. The WEF Annual Meeting 2020 is scheduled to take place on Jan. 21-24 in Davos-Klosters in Switzerland.