| HONGKAI CHINA LIMITED | Private company limited by shares | Live |
| HONGKAI FABRICS CLOTH COMPANY LIMITED | Private company limited by shares | Dissolved |
| HONGKAI GROUP(HK) CO., LIMITED | Private company limited by shares | Live |
| HK HONGKAI TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| HONGKAI DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| Hongkai Industrial Development Company Limited | Private company limited by shares | Live |
| SHENZHEN HONGKAI ELECTRONIC LIMITED | Private company limited by shares | Live |
| HK HONGKAI ELECTRONICS LIMITED | Private company limited by shares | Live |
| HONGKAI ELECTRONICS CO., LIMITED | Private company limited by shares | Live |
| HONGKAI AIR CONDITIONING ENGINEERING LIMITED | Private company limited by shares | Live |
| HONGKAI OPTICAL CABLE EQUIPMENT CO., LIMITED | Private company limited by shares | Live |
| HONGKAI GLOBAL LIMITED | Private company limited by shares | Live |
| HONGKAI TECHNOLOGY GROUP LIMITED | Private company limited by shares | Live |
| (H.K) HONGKAI PRECISE MOLD LIMITED | Private company limited by shares | Dissolved |
| HONGKAI PAPER (HK) LIMITED | Private company limited by shares | Live |
| HONGKAI (HK) TRADING CO., LIMITED | | Live |
| OCEAN HONGKAI HOLDING COMPANY LIMITED | Private company limited by shares | Live |
| Hongkai Group (Holdings) Limited | Private company limited by shares | Live |
| HONG KONG HONGKAI INDUSTRIAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| HONGKONG HONGKAI LIMITED | Private company limited by shares | Live |
| HongKai (HongKong) Co., Limited | | Live |
| HONGKONG HONGKAI GROUP LIMITED | Private company limited by shares | Dissolved |
| HONGKONG HONGKAI GROUP LIMITED | Private company limited by shares | Live |
| HONGKONG HONGKAI SEAFOOD LIMITED | Private company limited by shares | Live |
| Hongkong Hongkai (International) Toys And Gifts Limited | | Live |
| HONGKONG HONGKAI TRADING CO., LIMITED | Private company limited by shares | Live |
| HONGKAI INDUSTRIAL CO., LIMITED | Private company limited by shares | Dissolved |
| HK HONGKAI INDUSTRIAL CO., LIMITED | Private company limited by shares | Live |
| HONGKAI INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| HK HONGKAI INTERNATIONAL BUSINESS & TRADE LIMITED | Private company limited by shares | Live |
| HONGKAI INTERNATIONAL CO., LIMITED | Private company limited by shares | Live |
| HK HONGKAI INTERNATIONAL TRADE CO., LIMITED | Private company limited by shares | Live |
| Hongkai International Trade Co., Limited | | Live |
| HONGKAI INTERNATIONAL GROUP (HK) CO., LIMITED | Private company limited by shares | Dissolved |
| Hongkai (Hong Kong) International Co., Limited | Private company limited by shares | Live |
| HONG KONG HONGKAI INTERNATIONAL GROUP LIMITED | Private company limited by shares | Live |
| HONGKAI INTERNATIONAL INDUSTRIAL LIMITED | Private company limited by shares | Live |
| HONGKAI INTERNATIONAL MARINE SERVICES GROUP LIMITED | Private company limited by shares | Live |
| HONGKAI INTERNATIONAL MARINE SERVICES GROUP LIMITED | | Live |
| Hongkai International Technology Co., Limited | Private company limited by shares | Live |
| HONGKAI INT'L FASHION (HK) LIMITED | Private company limited by shares | Live |
| HONG-KAI CHINESE MEDICINE CLINIC LIMITED | Private company limited by shares | Live |
| HONG-KAI CHINESE MEDICINE CLINIC (FANLING) LIMITED | Private company limited by shares | Dissolved |
| HONG-KAI CHINESE MEDICINE CLINIC (WHAMPOA) LIMITED | Private company limited by shares | Live |
| HONG-KAI PHARMACEUTICALS HOLDINGS CO LIMITED | Private company limited by shares | Live |
| Hongkai Precision Manufactory Limited | Private company limited by shares | Live |
| HK HONGKAI SHARES LIMITED | Private company limited by shares | Live |
| HONGKAITONG TRADING LIMITED | Private company limited by shares | Live |
| HONGKAIXING TRADE CO., LIMITED | Private company limited by shares | Live |