Bangkok, Chiang Mai, Phuket, travel advice.

1. Personally, Chiang Mai lasts at least 4 days, and it's boring if the time is short. Koh Samui is 3 days, Phuket is 5 days, and you can go to the outer islands to play. Three days in Bangkok, mainly to see several major attractions and shopping. And what do you prefer? Sea and beach? Or the city?

2. There's plenty of time to go from Bangkok to Chiang Mai. You can take a bus, estimated at 1 hours, or you can fly there. Bangkok-Phuket takes about 6 hours by car and can also fly.

3. I suggest you go to Samui first, then Phuket, then Bangkok, then Chiang Mai, and then return to China in Bangkok. This should be more reasonable.

4. If you want to save money, and you are alone, you can find a hotel after the past, and the general price is less than 2. Then try to take the bus and run away.

I think of these for the time being. You can ask questions and I will answer them one by one.