The company changed accounting code from 556012 to 557012.
Increasing of doubtful account from 2014 because the company recorded allowance for doubtful account of บจก.พระนครออกแบบ amount 1,676,070.4 Baht and บจก.สหทรัพย์เจริญ amount 2,707,923.9 Baht in June 2015.