| Company | Timeline | Status | |
| Slendertone Limited Director • Director | 21 Feb 2003←22 Years→Current | Active | |
| C-Scope International Holdings Limited Director • Production Director | 1 Apr 1992←33 Years→Current | Active | |
| Ultratone Bodyshapers Limited Director • Production Director | 5 Mar 1992←33 Years→Current | Active | |
| Speed 9495 Limited Director • Production Director | 5 Mar 1992←33 Years→Current | Active | |
| Ultratone Scientific Instruments Limited Director • Production Director | 1 Mar 1992←33 Years→Current | Active | |
| Topper International Limited Director • Production Director | 20 Dec 1991←33 Years→Current | Active | |
| C-Scope International Holdings Limited Secretary • Unreported | 20 Dec 1991←33 Years→Current | Active | |
| Ultratone Scientific Instruments Limited Secretary • Unreported | 20 Dec 1991←33 Years→Current | Active | |
| C. Scope International Limited Director • Production Director | 20 Dec 1991←33 Years→Current | Active | |
