Aerial photo taken on March 10, 2021 shows the construction site of Meizhou Bay cross-sea bridge of the Fuzhou-Xiamen high-speed railway in southeast China's Fujian Province. Main towers of the bridge have been topped off on Wednesday. The 14.7-km-long bridge is part of the province's Fuzhou-Xiamen high-speed railway, which is expected to be put into operation in 2022. (Photo by Jin Wei/Xinhua)

Photo taken on March 10, 2021 shows the construction site of Meizhou Bay cross-sea bridge of the Fuzhou-Xiamen high-speed railway in southeast China's Fujian Province. Main towers of the bridge have been topped off on Wednesday. The 14.7-km-long bridge is part of the province's Fuzhou-Xiamen high-speed railway, which is expected to be put into operation in 2022. (Photo by Jin Wei/Xinhua)

Aerial photo taken on March 10, 2021 shows the construction site of Meizhou Bay cross-sea bridge of the Fuzhou-Xiamen high-speed railway in southeast China's Fujian Province. Main towers of the bridge have been topped off on Wednesday. The 14.7-km-long bridge is part of the province's Fuzhou-Xiamen high-speed railway, which is expected to be put into operation in 2022. (Photo by Jin Wei/Xinhua)

来源：Xinhua