During the formation of some Asian countries close to China, such as Japan and South Korea, their national cultures were affected to varying degrees by the Han culture, and at the same time, Han culture also incorporated the ethnic-cultural elements of these countries. Therefore, although in modern times The connotation of Chinese culture in civilization can no longer cover the contents of all nationalities and cultures in eastern Asian countries, it is still a typical representative of the culture in this region. What is the point directly addressed in this passage? ['The culture of Japan, South Korea and other countries has been deeply influenced by the Han culture.', 'Han culture also absorbs the cultural elements of different nationalities in other countries.', 'Han culture is a typical representative of the cultures of eastern Asia.', 'Han culture remains an important part of modern civilization.']