| Company | Timeline | Status | |
| China Trading Centre Limited Director • Electro Mechanical Engineer | 11 Jul 1994←11 Years→5 Jun 2006 | Liquidation | |
| China Trading Centre Limited Secretary • Electro Mechanical Engineer | 11 Jul 1994←11 Years→5 Jun 2006 | Liquidation | |
| Machine Technology Limited Director • Electro-mechanical Engineer | 12 Sep 1991←14 Years→5 Jun 2006 | Active | |
| Arcadia Engineering Co. Limited Director • Elector-mechanical Engineer | 7 Sep 1991←14 Years→5 Jun 2006 | Dissolved | |
