Jeju Island sneaked into South Korea. Why is the entry restriction for one year after returning to China?

The Korean government generally shares relevant information with other countries, resulting in being banned from entering the country on a global scale. According to the laws and regulations of South Korea, the entry and exit regulations of South Korea are very strict, and foreigners who will come to South Korea need to abide by the relevant regulations from the beginning of entry. If there is any violation, the Immigration Bureau will generally deal with it in accordance with relevant laws, including repatriation and prohibition of entry.