1 18 square meters. What's the annual property fee?

This depends on the pricing of your residential property company. If it is an ordinary community, the property fee is generally more than one square meter. If it is a business, or a high-grade house or villa, the property fee is even more expensive.

You can ask the property consultant of the developer, or the person who will show you the house, and they will tell you clearly that the operating fee of ordinary residential quarters in Haikou, Hainan is 1~ 1.8 yuan per square meter/month.