| Hong Kong Mengtai Biotechnology Co., Limited | Private company limited by shares | Live |
| Mengtai Technology Co., Limited | | Live |
| MENGTAI PRECISION METAL (H.K.) LIMITED | Private company limited by shares | Live |
| HONGKONG MENGTAI ENERGY INVESTMENT LIMITED | Private company limited by shares | Live |
| MengTai Group (Hongkong) Industrial Co., Limited | Private company limited by shares | Live |
| Hong Kong Mengtai International Limited | Private company limited by shares | Dissolved |
| Mengtai Intelligent Technology (HK) Co., Limited | Private company limited by shares | Live |