| R.S.T. TRADING GROUP (HK) CO. LIMITED | Private company limited by shares | Dissolved |
| R.S.T International Logistics (HK) Limited | Private company limited by shares | Live |
| RSTAR LIMITED | Private company limited by shares | Live |
| R&STAR LIMITED | Private company limited by shares | Live |
| RSTECH LIMITED | Private company limited by shares | Live |
| RSTECH TRADING LIMITED | Private company limited by shares | Live |
| RSTEEL INTERNATIONAL LIMITED | Private company limited by shares | Live |
| Rster Limited | | Live |
| RSTO Industrial Co., Limited | | Live |
| RSTON TECHNOLOGY HONGKONG CO., LIMITED | Private company limited by shares | Live |
| R.STONE LIMITED | Private company limited by shares | Live |