| Company Name | Type | Status |
|---|---|---|
| HONGKONG Z.S.T. LIMITED | Private company limited by shares | Live |
| HK ZSTAR LIMITED | Private company limited by shares | Live |
| ZSTAR-CHINA LIMITED | Private company limited by shares | Live |
| ZSTC Limited | Private company limited by shares | Live |
| ZSTD LIMITED | Live | |
| ZSTK COMPANY LIMITED | Live | |
| ZSTKAN COMPANY LIMITED | Live |