| HILONG ENERGY LIMITED | Private company limited by shares | Live |
| Hilong Marine Engineering (Hong Kong) Limited | Private company limited by shares | Live |
| HILONG (HONG KONG) LIMITED | Private company limited by shares | Live |
| QINGDAO HILONG INDUSTRIAL CO., LIMITED | Private company limited by shares | Live |
| HILONG INDUSTRY LIMITED | Private company limited by shares | Live |
| HILONG INTERNATIONAL INVESTMENT CO. LIMITED | Private company limited by shares | Live |
| Hilong New Material Limited | Private company limited by shares | Live |
| TAIWAN HILONG PLANT PROTECTION TECH LIMITED | Private company limited by shares | Dissolved |
| Hilong Technology Limited | Private company limited by shares | Live |
| HILONG INTERNATIONAL TRADING LIMITED | Private company limited by shares | Live |