The undated photo provided by the Second Harbor Engineering Co, Ltd under China Communications Construction Co, Ltd (CCCC) shows "Erhang Changqing," China's new self-developed pile-driving vessel.

The piling ship Erhang Changqing is seen at a port in Qidong, Jiangsu province, on Sunday. XU CONGJUN/FOR CHINA DAILY NANJING — China's new self-developed pile-driving vessel, the largest of its ...