The identity of the guard smiles ", Thailand has come without luck, help the old people's habits because Thailand is one of them, but after this I don't know if any mechanical reason. People in Thailand, we smiled.
Guard Smile "unique to Thailand. Acquired without luck. Because of the nature of Thailand is so. However, over recent years, That's why any mechanical Thailand, we smile less
The land of smiles ". The identity of has no luck. Because the characteristic of Thai) is that, but recently, I don't know why technicality Thais smile less