| Company | Timeline | Status | |
Hill Acoustics Limited Director • Acoustic Engineer | 10 Sep 2013←5 Years→25 Sep 2018 | Dissolved | |
| Yingshung Limited Director • Unreported | 16 Apr 2003←22 Years→Current | Active | |
| Yingshung Limited Secretary • Business Consultant | 16 Apr 2003←22 Years→Current | Active | |
| Rydal Hall Management Services Limited Director • Audio Engineer | 15 Sep 2002←14 Years→24 Oct 2016 | Active | |
