| SINFA LIMITED | Private company limited by shares | Live |
| Sinfa Consulting Limited | Private company limited by shares | Live |
| SINFA WATCH INDUSTRY (HK) CO., LIMITED | Private company limited by shares | Dissolved |
| SINFA INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| Sinfachem Limited | Private company limited by shares | Live |
| SINFAIR LIMITED | Private company limited by shares | Dissolved |
| SINFAITH COMPANY LIMITED | Private company limited by shares | Dissolved |
| SINFARR TRADING COMPANY LIMITED | Private company limited by shares | Live |
| SINFAST LIMITED | Private company limited by shares | Dissolved |
| Sinfay Trading Company Limited | Private company limited by shares | Live |