On the afternoon of 29th October 2013, two ASD tugboats named Cao Gang 19 and Cao Gang 20 were delivered to Tangshan Caofeidian Tugboat Co., Ltd from Zhenjiang Shipyard, starting their sails smoothly. Mr. Sun Hong, general manager of Tangshan Caofeidian Shiye Co., Ltd and Mr. Ho Shouzhu, general manager of Tangshan Caofeidian Tugboat Co., Ltd, with other leaders and guests attended the delivering ceremony in Zhenjiang Shipyard.