Rui'an is city situated in China. It has a population of 200,000 people and covers a land area of 1,271 km², 3,037 km² when including water are…Rui'an is city situated in China. It has a population of 200,000 people and covers a land area of 1,271 km², 3,037 km² when including water area. Natives of the city speak the Rui'an dialect of Wu Chinese.