Hainan is a province with extremely developed tourism and one of the special zones. Why is it still so backward, even wide?

Hainan's policies and propaganda are good, but after all, it has only been established for more than 20 years and has long been a national war zone. Coupled with the island effect, education is backward, and most local people are lazy, backward and closed. Except for Haikou, Sanya and Wenchang, most infrastructure facilities are backward, and for many reasons, the economy has been unable to get up. Tourism is very developed, but why? It is not that there are not too many heavy industries and the pollution is relatively light, so the secondary industry is a short board, and its development speed cannot keep up with the pace of mainland cities. There are many other reasons, so I will elaborate on them one by one. . . . I hope it works for you.