 He also wrote "Handbook for the Guidance of Shipmasters on the Ichang-Chungking Section of the Yangtze River", a detailed and illustrated account of the Upper Yangtze's currents, rocks, and other hazards with navigational instruction.Plant trained hundreds of Chinese and foreign pilots and issued licenses and worked with the Chinese government to make the river safer in 1917 by removing some of the most difficult obstacles and threats with explosives.In August 1917, British Asiatic Petroleum became the first foreign merchant steamship on the Upper Yangtze.