| 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  | |
