CITL carried out teaching assistant training via the MOOC platform of ShanghaiTech University from February 29th to March 27th, 2020. This training, hosted by Dr. Hong Jie who is the deputy director of CITL, consists of two parts: how to be a qualified TA and how to help with online courses. This online training course was carried out in the form of SPOC, and only open to the 2020 spring TAs. A total of 382 TAs from eight schools and institutes participated in the online training, and 341 TAs completed it.