| Company | Timeline | Status | |
| One Oak Management Company Limited Secretary • Teacher | 13 Mar 2006←4 Years→31 Mar 2010 | Active | |
| One Oak Management Company Limited Secretary • Teacher | 20 Feb 1995←4 Years→1 Mar 1999 | Active | |
| One Oak Management Company Limited Director • Teacher | 23 Apr 1991←25 Years→12 Aug 2016 | Active | |
