Because China is a great historical country with a long history of 5,000 years. South Korea is just a small country that appeared later. Historically, South Korea was actually a vassal state of China. It was not until modern times that it established its own country independently from North Korea on the 38th parallel because of the war. Korean clothing is obviously based on Hanfu. Because they used the traditional culture of China for reference in history, but up to now they haven't figured out where their culture originated. They think that some things in China are their own. Because their land area is very small, their geographical environment is relatively harsh, there are no representative crops, and the climate is very cold, so they can only take kimchi as their staple food.
In fact, it is very unwise to argue about kimchi, because kimchi, as a very common thing, may appear in various countries and regions and cannot be monopolized. It cannot be forcibly said that it is a unique cultural product of this region. Most Korean netizens think that everything originated in South Korea, and their comments have also aroused the dissatisfaction of many people in China. The national self-confidence they built with a very narrow net name has happened many times in a very small country. It is not only a small pickle, but even the Dragon Boat Festival is competing with China. They even think that China's Hanfu is copying Hanfu. Even a saint like Confucius thinks it belongs to his own country, not China.
But they don't know anything about ancient history. They just talk nonsense according to the present. As early as 3,000 years ago, the world's earliest kimchi appeared in China, and some ancient books in China recorded that there was kimchi in China. Therefore, we should respect history and be wise on the basis of looking at problems.