| HIGHGRADE ASIA CO. LIMITED | Private company limited by shares | Dissolved |
| BEIJING EMPEROR HIGH-GRADE LUBRICANT LIMITED | Private company limited by shares | Live |
| HONG KONG HIGH-GRADE TRADING CO., LIMITED | Private company limited by shares | Dissolved |
| HIGHGRADE DESIGN LIMITED | Private company limited by shares | Live |
| HIGHGRADE DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| HIGHGRADE ENTERPRISE LIMITED | Private company limited by shares | Dissolved |
| HIGHGRADE EXPRESS LIMITED | Private company limited by shares | Dissolved |
| HIGHGRADE INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| HIGHGRADE PACIFIC LIMITED | Private company limited by shares | Dissolved |
| HIGHGRADE PEARLS LIMITED | Private company limited by shares | Dissolved |
| HIGHGRADE RESOURCES LIMITED | Private company limited by shares | Live |
| RICH HIGH-GRADE LIMITED | Private company limited by shares | Dissolved |
| HIGHGRADE TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| CHINA HIGH-GRADE TECHNOLOGY HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| CHINA HIGH-GRADE TECHNOLOGY DEVELOPMENT HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| HIGHGRADE TURNOVER LIMITED | Private company limited by shares | Dissolved |