| Company | Timeline | Status | |
| Portland Heat Treatment Company Limited Secretary • Unreported | 11 Jun 2006←19 Years→Current | Active | |
| Portland Engineering Company Limited Secretary • Unreported | 11 Jun 2006←19 Years→Current | Liquidation | |
| Fortuneswell Management Company Limited Secretary • Unreported | 11 Jun 2006←17 Years→25 Sep 2023 | Active | |
