 Foreign westerners made and sold sesame cakes in China during the Tang dynasty.During the Southern and Northern Dynasties non-Han people like the Xianbei of Northern Wei introduced their cuisine to northern China, and these influences continued up to the Tang dynasty, popularizing meat like mutton and dairy products like goat milk, yogurts, and Kumis among even Han people.It was during the Song dynasty that Han Chinese developed an aversion to dairy products and abandoned the dairy foods introduced earlier.