The "Quantitative Biology Symposium 2022" was successfully held by the Center for Quantitative Biology (CQB) at Peking University on 3-4 Dec. The symposium is one of the series activities to celebrate the 20^th anniversary of CQB, which was founded in 2001 to develop pioneering interdisciplinary and quantitative biological studies in China. We are proud to be part of CQB for the past six years!