China has imposed export controls on eight companies tied to Taiwan’s military as the self-ruled island began annual military exercises.

China placed eight Taiwanese suppliers of military equipment on an export control list, a move that’s likely to have a limited impact on the armed forces of the self-run democracy.China’s Ministry of Commerce said Wednesday it was banning shipments of dual-use products to entities in Taiwan including Aerospace Industrial Development Corp.

China imposes export controls on eight Taiwan military contractors including aerospace and shipbuilding firms.