This contrast between China and South Korea is often found in the report of CET-6 in our school. In contrast, it is mainly to introduce China's tea culture (the key point is this one), which can be accepted from China's tea planting and manufacturing, and then to drinking tea and utensils, and then you can write many poems related to tea in ancient China, which can be quoted, and then write about the development of China's tea culture in the world, the attitude of modern China people to tea, the efficacy of tea and so on.

Then introduce Korean tea culture (I think Korean tea culture was handed down from China, you can talk about its historical origin, such as who handed it down and how it spread in Korea, and then write down the attitude of Koreans towards tea now).

The advantages of China tea culture and the disadvantages of China tea culture (for example, modern people's understanding of tea is not comprehensive enough, and publicity is not in place, etc.). )

Advantages and disadvantages of Korean tea culture (there seems to be not much tea in Korea, usually scented tea and barley tea)

Then compare how Chinese and Korean tea cultures should learn from each other and learn from each other. This aspect should also be emphasized, because you wrote a comparison of Chinese and Korean tea culture. In fact, the previous pile is all arguments. Now I'm just starting to write your opinion and check the information. It should be possible to write like this. You are a graduation thesis, and you can ask the teacher for the rest of the expansion.