Photo shows an interior view of Wuzhong Road Station of Shanghai Subway Line 15 in Shanghai, east China, Feb. 9, 2021. The Shanghai Subway Line 15 started trial operation on Jan. 23.

A passenger takes photos at Wuzhong Road Station of Shanghai Subway Line 15 in Shanghai, east China, Feb. 9, 2021. The Shanghai Subway Line 15 started trial operation on Jan. 23.

A staff member cleans a decorative wall at Wuzhong Road Station of Shanghai Subway Line 15 in Shanghai, east China, Feb. 9, 2021. The Shanghai Subway Line 15 started trial operation on Jan. 23.

People take photos at Wuzhong Road Station of Shanghai Subway Line 15 in Shanghai, east China, Feb. 9, 2021. The Shanghai Subway Line 15 started trial operation on Jan. 23.

A woman takes photos at Wuzhong Road Station of Shanghai Subway Line 15 in Shanghai, east China, Feb. 9, 2021. The Shanghai Subway Line 15 started trial operation on Jan. 23.

Passengers walk in a corridor of Wuzhong Road Station of Shanghai Subway Line 15 in Shanghai, east China, Feb. 9, 2021. The Shanghai Subway Line 15 started trial operation on Jan. 23. (Photos: Xinhua)