Aerial photo taken on March 21, 2019 shows the construction site of Zhuhai Chimelong marine science museum in Zhuhai, south China's Guangdong Province. (Xinhua/Liang Xu)

Aerial photo taken on March 21, 2019 shows the construction site of Zhuhai Chimelong marine science museum in Zhuhai, south China's Guangdong Province. (Xinhua/Liang Xu)

Aerial photo taken on March 21, 2019 shows the construction site of Zhuhai Chimelong marine science museum in Zhuhai, south China's Guangdong Province. (Xinhua/Liang Xu)

Photo taken on March 21, 2019 shows the steel structure of the roof of Zhuhai Chimelong marine science museum under construction in Zhuhai, south China's Guangdong Province. (Xinhua/Liang Xu)

This combination photo shows the effect picture (upper) and the construction site of Zhuhai Chimelong marine science museum taken by a drone in Zhuhai, south China's Guangdong Province, March 21, 2019. (Xinhua)