Xin Chao is a greeting for all times. In the morning, in the noon time, in the evening time at Veit Nam.
If adding Xin, it is polite way. Therefore, normaly Chao only. Sounds like Italian greeting.

My first implession is too many moter cycles. Moter cycles in the picture is not many. At the rode cross, many motor cycles come and going. I wounder why the can drive motor cycle without accident. But I saw one accident just in front of my eye.