| December 16, 2011 | Office closing at "New year holiday" |
|---|---|
| July 12, 2011 | Office closing at "Japanese summer holiday" |
| May 31, 2011 | Vitec will possess 100% of PTT shares. |
| December 21, 2010 | Office closing at"New year holiday" |
| November 1, 2010 | PTT(ShenZhen) opened. |
| August 26, 2010 | Office Headquarters Relocation |
| December 25, 2009 | Office closing at"New year holiday" |
| August 7, 2009 | Office closing at"Japanese summer holiday" |
| April 20, 2009 | Office closing at"Golden Week" |
| March 31, 2009 | Change of Corporate Name |
| February 26, 2009 | Assignation of Shares |