Combined photos show aerial views of Tuandao in Qingdao, east China's Shandong Province, taken respectively in 1996 (upper) and on May 4, 2018. (Xinhua/Zhang Yan, Li Ziheng)

Development of the coastal city can be seen from the file photos of Qingdao taken by photographer Zhang Yan on a helicopter since 1996 and the new ones taken by drones. (Xinhua/Zhang Yan, Guo Xulei)

Qingdao, as one of the first Chinese cities to open up, was an important port for the Belt and Road, and that people could sense the extensive, profound local culture and the vitality of China's reform and opening-up. (Xinhua/Zhang Yan, Guo Xulei)

(Xinhua/Zhang Yan, Li Ziheng)

(Xinhua/Zhang Yan, Guo Xulei)

(Xinhua/Zhang Yan, Li Ziheng)

(Xinhua/Zhang Yan, Guo Xulei)