The Yaowarat road districts of Bangkok changed because of immigration. In the 1780s, Chinese immigrants to the Yoawarat road. (a road in the Pra- Nakon and Samphanthawong districts of Bangkok). They escaped poverty because of corruption, so Bangkok has more business. Today Yaowarat road is a community of Chinese, so you can see Chinese festivals,for example celebrate Chinese New Year and there are Chinese shops and restaurants, so there are the landmark of Bangkok.