| Company | Timeline | Status | |
| Hiflux Magnets Limited Director • Director | 31 Dec 2004←10 Years→4 Aug 2015 | Active | |
| Magna Power Equipment Limited Director • Director | 3 Jan 2002←13 Years→30 Jun 2015 | Active | |
| Master Magnets Limited Director • Engineer | 31 Dec 1991←4 Years→1 Aug 1996 | Active | |
