The mainly decrease in depreciation-building from Q1'2015 amount 1.05 MB due to the company has not depreciation expense-building in this year because
the company sold Bangkok's office rental to Ruam Chai kij Co.,Ltd. and made lease contract no. STEC-B-050/2558 for Bangkok's office rental
The contract start on 1 Sep 2015 to 31 Aug 2017.