I'm considering an option of travelling to Hainan (Sanya) alone. Thus, a number of questions appears:
1 Is it safe, eg to walk around in the evening for a young lady in Sanya and Dadunhai(sorry for incorrect spelling).
2 are credit cards accepted there? Or shall I take cash with me?
3 Language. Do Chinese speak English? Russian?
4 How's the weather at the moment and water (sea) temperature?
Thanx in advance for replies!