Just came back!!!
Dear K.Trakul
As seen in the picture, I think "กันเลยประตู" should be in the yellow circle marked by the black arrow? Unfortunately, I couldn't take it out because
1. I didn't know how to cope with another 2 points ( shown by the 2 red arrows).
2. The second problem, may be, I try to check the screw around the yellow circle area but still doubted.
I may need to take all to Bangkok tomorrow or it will be thankfully if somebody could tell how to? Don't worry krub P'Trakul
Regards,
gohjaguar