Elsevier released CiteScore of 2021. CiteScore metrics reveal the impact of more than 27200 academic publications indexed by Scopus. We are pleased to announce IEEE/CAA Journal of Automatica Sinica’s latest CiteScore is 13.0, ranked TOP 1 (1/118) in the category of “Control and Optimization”, and ranked among top 5% (16/353) in the category of "Computer Science Information System", top 5% (14/270) in the category of "Control and Systems Engineering", and top 7% (20/269) in the category of “Artificial Intelligence". JAS has entered the 1st quantile (Q1) in all the categories it belongs to for four years.