I have two deep impressions of Hainan.
First, the description in the "Turbulent Thirty Years" series of the 1990s of Hainan exploiting policy loopholes, with the entire island engaged in car reselling.
Second, the Chengmai Ecological Software Park in 2018. With Huobi's establishment there, rumors circulated that you could confidently and boldly pursue blockchain technology in Chengmai; it was absolutely safe, as outsiders couldn't take it with them.
So, I always felt there was something special about this place. 😂