description:China League One (China League One, referred to as "China League One") is organized by the Chinese Football Association and participated by domestic professional football clubs. It is the second-level football professional league in the country, second only to the Chinese Football Association Super League. .
The China League One started in 2004 and was formerly known as the China Football League B. There were 17 teams participating in the first session, and a relegation system was implemented. In 2020, the Chinese League One will expand to 18 teams.