Haikou, Qionghai, Wanning and Sanya are the most suitable places to live.

I think Qionghai is more suitable for living, with good air, many trees, cool, civilized and polite, clean streets and convenient transportation. Only when you are comfortable physically and mentally can you live comfortably.

Haikou has convenient transportation, convenient shopping and fun, but it is crowded, noisy and stuffy. Suitable for work, not for life.

Sanya is a paradise for tourists, but there are too many migrants, the weather is too hot and the light is too strong. Only suitable for tourism, not for living.

Wanning, the traffic is inconvenient, and I don't know much about others.