以下短文讲述了同一单词,请写出此单词(首字母小写,只需写一次) C__________ is a very popular food in many Asian countries. Somebody calls it "C__________ Soup" and others calls it rice porridge. It is made from mixing boiling water with raw rice. The density of c__________ depends on different countries and culture. Lots of people think that the earliest appearance of c__________ is when there was famine or war. NO! That's definitely wrong. The earliest we find the story about c__________ was around year 618 in Tang Dynasty (唐朝), China. The King at that time used c__________ for medication.