| Company | Timeline | Status | |
| Portland Mobility Company Limited Director • Director  | 12 Apr 2011←11 Years→17 Jan 2023  | Dissolved  | |
| Fortuneswell Management Company Limited Director • Company Director  | 23 Feb 1996←26 Years→25 Jun 2022  | Active  | |
| Portland Engineering Company Limited Director • Director  | 31 Jan 1992←30 Years→25 Jun 2022  | Liquidation  | |
| Portland Heat Treatment Company Limited Director • Director  | 31 Dec 1990←31 Years→25 Jun 2022  | Active  | |
| Portland Heat Treatment Company Limited Secretary • Unreported  | 31 Dec 1990←18 Years→4 Mar 2009  | Active  | |
