I just realized that actually thailand moter show has many host.
One is host by The Bangkok International Motor Show is organized by the Grand Prix International Co., Ltd, and were founded by Dr. Prachin Eamlumnow in 1979. The official Co-sponsors of the Bangkok International Motor Show is The Royal Automobile Association of Thailand under Royal Patronage, Ministry of Industry, Ministry of Tourism and Sports, Tourism Authority of Thailand and the Thai Auto-Parts Manufacturers Association. (Wikipedia)
And, Thailand Moter Expo that was arranged by auto info who organize the event. I guess they are Magazine company. Actually, the event seem similar to first one. The pretty is also the same person. Please Check