| China Base Installation Investment Group Limited | Private company limited by shares | Live |
| Star Bright Installation Company Limited | Private company limited by shares | Live |
| SUNDART DOOR & FLOORING INSTALLATION LIMITED | Private company limited by shares | Dissolved |
| SUNDART DOOR INSTALLATION LIMITED | Private company limited by shares | Dissolved |
| BIN XING MACHINERY & ELECTRIC INSTALLATION (HONGKONG) CO., LIMITED | Private company limited by shares | Live |
| HK Henglai Mechanical & Electrical Installation Limited | Private company limited by shares | Live |
| Asia Design Installation Engineering Company Limited | Private company limited by shares | Live |
| ZHEJIANG GAONENG ELECTRIC INSTALLATION CO., LIMITED | Private company limited by shares | Live |
| HONGKONG MEI-KEI STAGE LIGHTING INSTALLATION CO., LIMITED | Private company limited by shares | Live |
| LUK'S MACHINERY INSTALLATION LIMITED | Private company limited by shares | Live |
| CHINA OVERSEAS INSTALLATION WORKS LIMITED | Private company limited by shares | Live |
| OVERBALANCED POWER INSTALLATION COMPANY LIMITED | Private company limited by shares | Dissolved |
| Installation Service Limited | Private company limited by shares | Live |
| Shan Kong Installation Co. Limited | | Live |
| SHANGHAI SENYE MECHANICAL & ELECTRICAL INSTALLATION COMPANY LIMITED | Private company limited by shares | Live |
| HOP SHENG INSTALLATION CO. LIMITED | Private company limited by shares | Live |
| ALPHOROW SOFT INSTALLATION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| Software And Installation Limited | Private company limited by shares | Live |