| Company | Timeline | Status | |
| Roysway Precision Grinding Limited Director • Partner | 10 Jul 2002←9 Years→5 Apr 2012 | Active | |
| Roysway Precision Grinding Limited Secretary • Partner | 10 Jul 2002←9 Years→5 Apr 2012 | Active | |
| Vero Limited Secretary • Unreported | 31 Aug 1991←16 Years→23 Aug 2008 | Active | |
