韩国足球联赛分几级?K1到K4升降规则全解 韩国足球联赛分级及升降规则详解
How many levels are there in the South Korean football league? A Comprehensive Explanation of the promotion and relegation Rules from K1 to K4 in the Korean Football League: Detailed Classification and Promotion Rules
以上为机器翻译结果，长、整句建议使用 人工翻译 。