Is Hainan a livable city?

I think Hainan is a livable city, first of all, because the climate in Hainan is very good, the four seasons are mild, and because it is coastal, the temperature will not change much. Secondly, because its air is better, and because it is a coastal city, the pollution is relatively less serious than that in the mainland. It is very suitable for an old-age city, and people living here are very happy. That is to say, it is a very livable city in terms of environment, but the competition in this city is also very fierce.