What clothes are suitable for traveling to Xinmatai from February 1 to February 21, 213? What are the taboos when traveling? Why bring things? thank you

I went at the end of February last year, so I can just wear summer clothes. It's about 3 degrees hot, so I can't wear a coat in Thailand. When I go to Genting Casino in Malaysia, I have to wear a coat and trousers. It's very cold and it will rain. In Thailand, I'd better wear a long skirt, which will keep my legs dry and cool. I'd better wear a pair of slippers, a washcloth and toiletries, and nothing else seems to be cool.