(Reuters) - The Trump administration on Thursday unveiled an executive order prohibiting U.S. investments in Chinese firms that Washington says are owned or controlled by the Chinese military. The order could impact some of China’s biggest companies. It is designed to deter U.S. investment firms, pension funds and others from buying and selling shares of 31 Chinese companies that were designated by the Defense Department as backed by the Chinese military earlier this year. Below is a list of those companies based on Department of Defense data found here here and here here. Most of them have subsidiaries listed in mainland China and/or Hong Kong. Aviation Industry Corporation of China China Aerospace Science and Technology Corp China Aerospace Science and Industry Corp China Electronics Technology Group Corp China South Industries Group Corp China State Shipbuilding Corp China North Industries Group Corp (Norinco Group) Hangzhou Hikvision Digital Technology Huawei Technologies Inspur Group Aero Engine Corporation of China China Railway Construction Corp CRRC Corp Panda Electronics Group Dawning Information Industry Co China Mobile Communications Group China General Nuclear Power Group China National Nuclear Corp China Telecommunications Corp China Communications Technology China Communications Construction Company (CCCC) China Academy of Launch Vehicle Technology (CALT) China Spacesat China United Network Communications Group China Electronics Corporation China National Chemical Engineering Group Co Ltd China National Chemical Corporation (ChemChina) SinoChem Group Co Ltd China State Construction Group China Three Gorges Corporation China Nuclear Engineering & Construction Corporation