The US Defense Department has added Chinese tech companies Tencent, a social media and gaming giant, and CATL, the world’s largest battery maker, to a list of firms that it alleges work with China’s military.

A staff member cleans a display showing the locations of battery maker CATL's production bases, at the CATL booth during the first China International Supply Chain Expo (CISCE) in Beijing, China November 28,

The US has added several Chinese technology companies, including gaming and social media giant Tencent and battery maker CATL, to a list of businesses it says work with China's military. The list serves as a warning to American companies and organisations about the risks of doing business with Chinese entities.