Chang Lat Seng, a staff member of the restaurant for teaching at the Macao Institute for Tourism Studies who has been working for 22 years, serves a customer at the restaurant in Macao, south China, Nov. 26, 2019. Since its return to the motherland 20 years ago, Macao has made great strides in economic development and achieved prosperity and stability. (Xinhua/Cheong Kam Ka)