Yearender: U.S.-China subnational ties robust in 2019 despite crosscurrents

The Chinatown Friendship Gate is pictured in Philadelphia, the United States, March 13, 2019. The similarities in port, science and cultural diversity have helped fostering 40 years of sisterhood between the Chinese coastal city of Tianjin and the U.S. eastern city of Philadelphia. In 2019, while the bilateral relationship between China and the United States is going through some rough patches at the national level, wide-ranging exchanges and cooperation at the subnational level have not been losing steam. (Xinhua/Li Muzi)