To improve teachers/instructors's teaching quality, CITL holds teaching assistant training every semester from 2019 Fall. We regularly update training contents and organize "Think & Share Seesion" for teaching assistants to share their experiences and thoughts. Every teaching assistant is required to attend the training. Moreover, to build a communication platform, CITL provides consultation service for teaching assistants. CITL has had six training sessions and a total of 2730 TAs from eight schools and institutes participated in the online training till now.