| Company | Timeline | Status | |
| Con Mech Engineers Limited Secretary • Unreported | 14 Sep 2001←5 Years→19 Apr 2007 | Active | |
| Con Mech Group Limited Secretary • Unreported | 14 Sep 2001←5 Years→19 Apr 2007 | Active | |
| C.S.Du Mont Limited Secretary • Unreported | 14 Sep 2001←5 Years→19 Apr 2007 | Dissolved | |
