People work at the construction site of Xiongan Station of Beijing-Xiongan intercity high-speed railway in Xiongan New Area, north China's Hebei Province, Oct. 10, 2019. Covering an area of 470,000 square meters, Xiongan Station is consisted of three floors above ground and two floors beneath ground. (Xinhua/Xing Guangli)

People work at the construction site of Xiongan Station of Beijing-Xiongan intercity high-speed railway in Xiongan New Area, north China's Hebei Province, Oct. 10, 2019. Covering an area of 470,000 square meters, Xiongan Station is consisted of three floors above ground and two floors beneath ground. (Xinhua/Xing Guangli)

People work at the construction site of Xiongan Station of Beijing-Xiongan intercity high-speed railway in Xiongan New Area, north China's Hebei Province, Oct. 10, 2019. Covering an area of 470,000 square meters, Xiongan Station is consisted of three floors above ground and two floors beneath ground. (Xinhua/Xing Guangli)

Aerial photo taken on Oct. 10, 2019 shows the Xiongan Station of Beijing-Xiongan intercity high-speed railway under construction in Xiongan New Area, north China's Hebei Province. Covering an area of 470,000 square meters, Xiongan Station is consisted of three floors above ground and two floors beneath ground. (Xinhua/Xing Guangli)

Aerial photo taken on Oct. 10, 2019 shows the Xiongan Station of Beijing-Xiongan intercity high-speed railway under construction in Xiongan New Area, north China's Hebei Province. Covering an area of 470,000 square meters, Xiongan Station is consisted of three floors above ground and two floors beneath ground. (Xinhua/Xing Guangli)

A man works at the construction site of Xiongan Station of Beijing-Xiongan intercity high-speed railway in Xiongan New Area, north China's Hebei Province, Oct. 10, 2019. Covering an area of 470,000 square meters, Xiongan Station is consisted of three floors above ground and two floors beneath ground. (Xinhua/Xing Guangli)