A worker is seen at the construction site of the Wufengshan Yangtze River Bridge in Zhenjiang, east China's Jiangsu Province, May 10, 2019. Some 704 main cable strands for the bridge, a part of the Lianyungang-Zhenjiang railway, were successfully erected Friday in Jiangsu, marking the erection of China's first road-rail suspension bridge's main cable was finished. The bridge is scheduled to be completed within 2019 and open to traffic by 2020. [Photo / Xinhua]

Aerial photo shows the construction site of the Wufengshan Yangtze River Bridge in Zhenjiang, east China's Jiangsu Province, May 10, 2019. Some 704 main cable strands for the bridge, a part of the Lianyungang-Zhenjiang railway, were successfully erected Friday in Jiangsu, marking the erection of China's first road-rail suspension bridge's main cable was finished. The bridge is scheduled to be completed within 2019 and open to traffic by 2020. [Photo / Xinhua]

Workers are seen at the construction site of the Wufengshan Yangtze River Bridge in Zhenjiang, east China's Jiangsu Province, May 10, 2019. Some 704 main cable strands for the bridge, a part of the Lianyungang-Zhenjiang railway, were successfully erected Friday in Jiangsu, marking the erection of China's first road-rail suspension bridge's main cable was finished. The bridge is scheduled to be completed within 2019 and open to traffic by 2020. [Photo / Xinhua]

Aerial photo shows the construction site of the Wufengshan Yangtze River Bridge in Zhenjiang, east China's Jiangsu Province, May 10, 2019. Some 704 main cable strands for the bridge, a part of the Lianyungang-Zhenjiang railway, were successfully erected Friday in Jiangsu, marking the erection of China's first road-rail suspension bridge's main cable was finished. The bridge is scheduled to be completed within 2019 and open to traffic by 2020. [Photo / Xinhua]

Aerial photo shows the construction site of the Wufengshan Yangtze River Bridge in Zhenjiang, east China's Jiangsu Province, May 10, 2019. Some 704 main cable strands for the bridge, a part of the Lianyungang-Zhenjiang railway, were successfully erected Friday in Jiangsu, marking the erection of China's first road-rail suspension bridge's main cable was finished. The bridge is scheduled to be completed within 2019 and open to traffic by 2020. [Photo / Xinhua]