| Company | Timeline | Status | |
| Na Curtain Walling Holdings Limited Secretary • Unreported | 4 Oct 2006←19 Years→Current | Active | |
| Curtainwall Maintenance Limited Secretary • Unreported | 10 Oct 2003←22 Years→Current | Active | |
| Na Curtain Walling Limited Secretary • Company Secretary | 31 May 2002←23 Years→Current | Active | |
