Modern Northeast Asia is experiencing rapid social changes due to the rise of the large Chinese economy along with the economic chrysanthemum of Japan and the high economic growth of Korea. This led to urbanization, which caused many social problems due to urbanization, and the representative phenomenon of urbanization can be considered as low, childbirth, and elementary and aging society. The development process of industry is represented by expansionism, which leads to the departure of rural areas, and the population outflow of rural areas has accelerated the low, childbirth, and the early and aging society. Urban area also has positive effects on the process of industrialization, but various social problems and polarization problems have also been mass-produced. Industrial polarization means entry into multicultural society.
Ulsan area is a region where multicultural families have lived in a residential village since the Chosun Dynasty. The records of Ulsan's family register chiefs include Ulsan Dongmyeon Nongsori, Yudeungpori and Nammyeon Onyangri, and lived for generations. The records of Ulsan area called wildlings and dwarfs who were naturalized in Chosun as 'Hyanghwa', which is the current multicultural people. It is a record of the beginning of multicultural policy. In general, when wildlings are naturalized, the government has paid free of charge for houses, farmland, farming, and necessities, and sometimes gave them a rice paddy. We have been exempted from taxes from land for three years, or exempted from the ministry for 10 years. These measures are the policy tasks we should engrave in multicultural society.