In 2022, the doctoral service of calligraphy was enrolled in colleges and universities.

First of all, I think you typed the wrong word. You should be a doctoral student in calligraphy, because there is no doctoral student in calligraphy.

Colleges and universities enrolling doctoral students in calligraphy in 2022:

Tsinghua University, China Renmin University, China-UK Academy of Fine Arts, Capital Normal University, Beijing Normal University, China Academy of Fine Arts, China Communication University, beijing language and culture university, Central University of Finance and Economics, Beijing Jiaotong University, beijing city university, East China Normal University, Shanghai Jiaotong University, Shanghai University, Shanghai Normal University, Nankai University, Tianjin Academy of Fine Arts, Southwest University, Chongqing University, sichuan fine arts institute, Chongqing Normal University, China Academy of Fine Arts, Zhejiang University, Hangzhou.