| CREATIVE SYSTEM LIMITED | Private company limited by shares | Live |
| CREATIVE SYSTEM LIMITED | | Live |
| Cruise of System Company Limited | Private company limited by shares | Live |
| CUBIC SYSTEM LIMITED | Private company limited by shares | Live |
| CYBER SYSTEM LIMITED | Private company limited by shares | Dissolved |
| Cyber System Limited | Private company limited by shares | Live |
| CYBERCOM SYSTEM LIMITED | Private company limited by shares | Live |
| CYBERTECH SYSTEM LIMITED | Private company limited by shares | Dissolved |
| CYBERTECH SYSTEM LIMITED | Private company limited by shares | Live |
| DAILY SYSTEM LIMITED | Private company limited by shares | Dissolved |
| DAILY SYSTEM LIMITED | | Live |
| DATANET SYSTEM LIMITED | Private company limited by shares | Live |
| Daten System Limited | | Live |
| DeconTech System Limited | Private company limited by shares | Live |
| DELTA SYSTEM LIMITED | Private company limited by shares | Live |
| ONLINE TO OFFLINE ADVERTISING SYSTEM DEVELOPMENT LIMITED | Private company limited by shares | Live |
| EASTERN SYSTEM DEVELOPMENTS LIMITED | Private company limited by shares | Dissolved |
| DIGITRACKING SYSTEM LIMITED | Private company limited by shares | Dissolved |
| DIGITAL DOMAIN NAME SYSTEM LIMITED | Private company limited by shares | Dissolved |
| DRAGON SYSTEM LIMITED | Private company limited by shares | Dissolved |
| DRAGON SYSTEM LIMITED | | Live |
| DRAGONLINK SYSTEM LIMITED | Private company limited by shares | Dissolved |
| DREAMPRO SYSTEM LIMITED | Private company limited by shares | Dissolved |
| Digital SMATV and Security System Association (DSSA) Limited | Company limited by guarantee | Dissolved |
| EASTERN SYSTEM LIMITED | Private company limited by shares | Dissolved |
| EASY SYSTEM COMPANY LIMITED | Private company limited by shares | Dissolved |
| EASY SYSTEM LIMITED | Private company limited by shares | Live |
| EASY SYSTEM APP LIMITED | Private company limited by shares | Live |
| ECCOM SYSTEM LIMITED | Private company limited by shares | Dissolved |
| ECHO SYSTEM LIMITED | Private company limited by shares | Dissolved |
| E-CIRCULAR SYSTEM LIMITED | Private company limited by shares | Live |
| EGENERAL SYSTEM LIMITED | Private company limited by shares | Dissolved |
| SYSTEM ATS & ELECTRIC LIMITED | Private company limited by shares | Dissolved |
| PHOENIX ELECTRIC HEATING SYSTEM COMPANY LIMITED | Private company limited by shares | Dissolved |
| ENERGY-TECH AUTOMATION SYSTEM LIMITED | Private company limited by shares | Live |
| HYDRO ELECTRIC POWER SYSTEM ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| Orient Wave System Engineering Limited | Private company limited by shares | Live |
| SYSTEM ENGINEERS LIMITED | Private company limited by shares | Dissolved |
| SYSTEM ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| NEW SYSTEM ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| TOP SYSTEM ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| NEW SYSTEM ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| WIN SYSTEM ENTERPRISES LIMITED | Private company limited by shares | Live |
| NEW SYSTEM ENTERPRISES LIMITED | Private company limited by shares | Live |
| UNI SYSTEM ENTERPRISES LIMITED | | Live |
| ENVIRONTROL SYSTEM LIMITED | Private company limited by shares | Live |
| EQUITY SYSTEM LIMITED | Private company limited by shares | Live |
| eReading System Company Limited | Private company limited by shares | Dissolved |
| E-SMART SYSTEM LIMITED | Private company limited by shares | Live |
| KEY SYSTEM ESTATE LIMITED | Private company limited by shares | Dissolved |
| E-STOCK SYSTEM LIMITED | Private company limited by shares | Dissolved |
| ETCO SWITCHING SYSTEM COMPANY LIMITED | Private company limited by shares | Dissolved |
| EURO-LINK SYSTEM LIMITED | Private company limited by shares | Live |
| Evertop System Company Limited | Private company limited by shares | Live |
| E-WAY SYSTEM LIMITED | Private company limited by shares | Live |
| EXCELLENT SYSTEM LIMITED | Private company limited by shares | Dissolved |
| EXCELLENT SYSTEM LIMITED | | Live |
| EXTRA SYSTEM COMPANY LIMITED | | Live |
| Extreme System Limited | Private company limited by shares | Live |
| FAIR SYSTEM LIMITED | Private company limited by shares | Live |
| FAIR SYSTEM INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| FANCY SYSTEM LIMITED | Private company limited by shares | Dissolved |
| FAST SYSTEM LIMITED | Private company limited by shares | Live |
| FAST SYSTEM LIMITED | | Live |
| FILCO SYSTEM COMPANY LIMITED | Private company limited by shares | Live |
| GERMANY ZHONGQI FILTER SYSTEM (CHINA) INVESTMENT LIMITED | Private company limited by shares | Live |
| Finetec System Limited | Private company limited by shares | Live |
| SYSTEM FINITY LIMITED | | Live |
| Fiozhen System Limited | | Live |
| FIRMUS SYSTEM LIMITED | Private company limited by shares | Live |
| Firsat System Limited | Private company limited by shares | Dissolved |
| FIRST SYSTEM LIMITED | Private company limited by shares | Live |
| SYSTEM FOCUS LIMITED | Private company limited by shares | Dissolved |
| JC SYSTEM FOOTWEAR LIMITED | Private company limited by shares | Dissolved |
| FORD SYSTEM LIMITED | Private company limited by shares | Live |
| SYSTEM FORD LIMITED | Private company limited by shares | Dissolved |
| FORE-TECH SYSTEM COMPANY LIMITED | Private company limited by shares | Dissolved |
| FREE MOLDING SYSTEM LIMITED | Private company limited by shares | Dissolved |
| LAS FREIGHT SYSTEM LIMITED | Private company limited by shares | Live |
| AXISS FREIGHT SYSTEM LIMITED | Private company limited by shares | Live |
| FREIGHTLINK SYSTEM LIMITED | Private company limited by shares | Dissolved |
| AXISS FRIGHT SYSTEM LIMITED | Private company limited by shares | Live |
| Frontiers System Limited | Private company limited by shares | Live |
| FULBOND DIGITAL SYSTEM LIMITED | Private company limited by shares | Dissolved |
| FUNCTIONAL MATRIX SYSTEM (HOLDING) LIMITED | Private company limited by shares | Live |
| TCL SYSTEM FURNITURE LIMITED | Private company limited by shares | Dissolved |
| GAEA SYSTEM LIMITED | Private company limited by shares | Live |
| GALAXY SYSTEM LIMITED | Private company limited by shares | Dissolved |
| GALAXY SYSTEM LIMITED | Private company limited by shares | Dissolved |
| GALAXY SYSTEM (ASIA) LIMITED | Private company limited by shares | Live |
| GARLAND SYSTEM LIMITED | Private company limited by shares | Live |
| Garland Digital System Limited | Private company limited by shares | Live |
| SYSTEM GENERAL LIMITED | Private company limited by shares | Live |
| GLOBALTECH SYSTEM LIMITED | Private company limited by shares | Live |
| GLORY SYSTEM LIMITED | Private company limited by shares | Dissolved |
| SYSTEM GLORY LIMITED | Private company limited by shares | Live |
| GLORY SYSTEM LIMITED | | Live |
| GLORY SYSTEM (ASIA) LIMITED | Private company limited by shares | Dissolved |
| GOLD SYSTEM LIMITED | Private company limited by shares | Dissolved |
| GOLD SYSTEM LIMITED | Private company limited by shares | Dissolved |