A worker is seen at the construction site of Puqian Bridge in south China's Hainan Province, May 29, 2018. Construction of Puqian Bridge, which provides a quicker access to Wenchang City from Haikou City, is scheduled for completion at the end of 2018. The bridge is expected to promote economic growth of the northern part of Hainan Province. (Xinhua/Zhao Yingquan)

Aerial photo taken on May 29, 2018 shows Puqian Bridge under construction in south China's Hainan Province. Construction of Puqian Bridge, which provides a quicker access to Wenchang City from Haikou City, is scheduled for completion at the end of 2018. The bridge is expected to promote economic growth of the northern part of Hainan Province. (Xinhua/Zhao Yingquan)

Photo taken on May 29, 2018 shows Puqian Bridge under construction in south China's Hainan Province. Construction of Puqian Bridge, which provides a quicker access to Wenchang City from Haikou City, is scheduled for completion at the end of 2018. The bridge is expected to promote economic growth of the northern part of Hainan Province. (Xinhua/Zhao Yingquan)

Photo taken on May 29, 2018 shows Puqian Bridge under construction in south China's Hainan Province. Construction of Puqian Bridge, which provides a quicker access to Wenchang City from Haikou City, is scheduled for completion at the end of 2018. The bridge is expected to promote economic growth of the northern part of Hainan Province. (Xinhua/Zhao Yingquan)

Photo taken on May 29, 2018 shows Puqian Bridge under construction in south China's Hainan Province. Construction of Puqian Bridge, which provides a quicker access to Wenchang City from Haikou City, is scheduled for completion at the end of 2018. The bridge is expected to promote economic growth of the northern part of Hainan Province. (Xinhua/Zhao Yingquan)