| Company | Timeline | Status | |
| ASSP Holdings Limited Secretary • Unreported | 26 Nov 2008←16 Years→Current | Active | |
| Castle Polishing & Chrome Plating Limited Secretary • Unreported | 24 Nov 2008←16 Years→Current | Active | |
| Castle Chrome Plating Limited Secretary • Unreported | 5 Apr 2006←19 Years→Current | Active | |
