Jiangnan Shipyard
In 1859, he accepted an invitation to the court of the Taiping rebels in Nanjing, but his proposals aimed at increasing the efficiency of the Taiping Heavenly Kingdom were all eventually refused. In 1863, Yung was dispatched to the United States by Zeng Guofan to buy machinery necessary for opening an arsenal in China capable of producing heavy weapons comparable with those of the western powers. The arsenal later became Jiangnan Shipyard.