 At the time, China was in the process of mastering the license production of the US Mk 46 Mod.2 torpedo according to the deal first signed between China and United States in 1985.The 705th Institute (also known as Xi'an Precision Machinery Research Institute, 西安精密机械研究所), tasked to evaluate and reverse engineering the A244-S torpedo, was also responsible for Mk 46 Mod.