What is middle class salary in South Korea?

Could you please elaborate on the average income of the middle class in South Korea? I'm quite curious about the economic status of the middle-income earners in that country, especially given the rapid development of its technology and business sectors. I understand that salaries can vary depending on various factors such as industry, job position, and level of education, but I'm hoping to get a general understanding of what a comfortable middle-class income might look like in South Korea. Thank you for your assistance!