There are more than a dozen bus lines in Sanya city. The buses are in service from 6 am to 11 pm or so. The bus fare varies in the range of 1-4 Yuan according to the distance.
The starting price is 5 Yuan for 2 km, and 2 Yuan for every additional 2 kilometers. 1 Yuan/km will be charged for more than 20 kilometers beyond the downtown for returning empty. 2 Yuan will be charged for every 10 minutes' waiting.