Official website introduced that Chongqing Jialing Special Equipment Co., Ltd., a professional friend, is a large state-owned enterprise affiliated to China Ordnance Equipment Group Corporation. It was established in 1875, the Jiangnan Manufacturing General Administration of the Qing government, and it was one of the earliest military factories that produced bullets in China's modern military industry. The company's special products cover the navy, army, air force, public security frontier defense, anti-terrorism and other fields. It is an industry standard setter and the only supplier of inspection supplies for a special product in China.