Here you can find out more about transportation in Haikou, such as buses and trains.
List of Haikou Local Bus Routes
Here is a list of the bus routes in Haikou.
You can use this link to Google maps http://ditu.google.cn to get bus routes. Click on '公交／驾车' and enter the start point and destination. Google will show you a suggested route. Works best if you enter Chinese characters.
Useful Bus Routes from Haikou Banana Hostel
Here are some useful local bus routes to get around the city from Haikou Banana Hostel.