Feature: 40 years on, "sisterhood" between Tianjin, Philadelphia stands ever stronger

Samuel K. Chueh (R), Director of International Business at Philadelphia Department of Commerce, speaks to Xinhua during an interview in Philadelphia, the United States, March 13, 2019. The amazing 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. (Xinhua/Li Muzi)