Fueled by holding the World Historical & Cultural Cities Expo, on October 23^rd, 2016, Nanjing signed the Sister City Relationship Agreement with the city York in UK, and also signed a letter of intent to build sister city relationship with Semarang in Indonesia, as well as a letter of intent to launch cultural cooperation with San Antonio in USA.

On December 28^th, 2016, it was learned from Nanjing Metro that the high-profile metro line 5 construction project, as the first one to adopt the PPP (Public-Private Partnership) mode, officially commenced. It’s jointly invested by Greenland Holding Group Company Limited and Shanghai Tunnel Engineering Co., Ltd. with a total investment of up to 20 billion RMB.