On March 18, 2015, the rock-socketed piles (210 pieces) of the Yangshan Phase IV Wharf were drilled. As of October 5 of the same year, 76 pieces of φ2.3m and 126 pieces of φ2.5m were completed, and the remaining 8 independent mooring piers were Φ2. 0m rock-socketed pile is under construction.