Since when did Jangbaeksan Mountain come to the Korean Peninsula?

 Some of the Chinese civilizations of "Jangbaeksan Culture" are trying to make the Kando issue a disputed territory through academic research called the Northeast Project. One of the important tasks can be pointed out is the creation of a new so-called "Jangbaeksan Mountain (Baekdusan Mountain) culture." The scope of "Jangbaeksan Culture" is Jangbaeksan Mountain itself by agreement, but Gwangui stipulates that it is an area including the Jangbaeksan Mountain Range, centering on Jangbaeksan Mountain. China cited the characteristics of "Jangbaeksan Culture" as six. First, it is a multidimensional material culture that combines difficulty-collecting-wooden-agriculture. Second, there is the spirit of commerce that is simple, honest, and brave to protest because he is good at horseback riding. Third, I enjoy learning well, absorbing advanced things, and creating new things. Fourth, the shamanist culture of worship, which says there is a spirit in all things, is a traditional primitive belief and habit of each nation in the Jangbaeksan Mountain region. Fifth, there is a spirit of patriotism that defies external aggression. Sixth, it is a window through which cultures from Northeast Asian countries exchange. The Jangbaeksan Mountain area was a bridge that spread Chinese culture to the Korean Peninsula, Japan, and North America. It is also the starting point for Chinese civilization to go to countries in Northeast Asia and where Chinese and foreign cultures exchange. The famous Northeast Asian Silk Road passes through this place. China's embrace of northeast culture China creates the "Jangbaeksan culture" and tries to argue that it is an important part of Chinese culture, a regional culture with the characteristics of the northern people. It is also intended to emphasize that Goguryeo culture and Balhae culture are an important part of "Jangbaeksan culture" and part of Chinese civilization as they are connected to international politics. China argues that in-depth research should be conducted for the fundamental interests of the state and the Chinese people. In addition, it connects the "Jangbaeksan culture" to the economy. As a local culture, "Jangbaeksan Culture" argues that new life and vitality should be given in response to the era of global economic integration. The reason why China is mobilizing a new "Jangbaeksan culture" through the Northeast Project is that there are many differences between the culture of China's mainstream culture and the culture of the Northeast region, and this area was considered outside of China even in Chinese history. However, creating "Jangbaeksan Culture" and making it part of Chinese culture can end the Korea-China cultural debate. In addition, it can be seen that the intention is to dispel territorial disputes by explaining the Gando region, the core of the Korea-China territorial dispute, as a place where not only agriculture but also multidimensional cultures are mixed within the "Jangbaeksan culture." The limitation of the "Jangbaeksan Culture Theory" is that there is no explanation of where the "Jangbaeksan Culture" is based. In addition, the Korean Peninsula, which shares Jangbaeksan Mountain (Baekdusan Mountain) even though the category of "Jangbaeksan Mountain Culture" is centered on Jangbaeksan Mountain, is not dare to fall into the category of "Jangbaeksan Mountain Culture." It is very clear what China is trying to gain through the creation of an artificial culture.