There is a fabric street in Datong Road, Haikou, opposite the building of 华侨大厦. You can find tailors there and they sell fabric. You can choose or ask the tailor to recommend, or bring fabric you bought by yourself. About the price, the processing fee is about 150RMB. The price of fabric varies. It is expensive to choose good silk. Generally 10 days is enough to make one. You should try on to see if it fits very well. If not, ask the tailor to change. You should pay for the processing fee after all these are done.