| Company | Timeline | Status | |
| Sino-Britain Trading Limited Director • Company Secretary | 28 Nov 2005←8 Years→21 Aug 2014 | Active | |
| Clarksteel Limited Director • Company Secretary | 8 Apr 2004←10 Years→21 Aug 2014 | Active | |
| Clarksteel Galvanising Limited Director • Company Secretary | 12 Feb 1996←18 Years→21 Aug 2014 | Active | |
| Clark-Drain Limited Director • Company Secretary | 20 Sep 1992←21 Years→21 Aug 2014 | Active | |
| Clarksteel Holdings Limited Director • Company Secretary | 20 Sep 1992←21 Years→21 Aug 2014 | Active | |
