TMTPOST -- Tesla's Shanghai plant manager, Song Gang, has left the company, according to a letter he sent to staff on Wednesday. Song, who has been managing Gigafactory Shanghai since 2018, informed employees that Wednesday would be his final day with the company, as noted in the letter obtained by Reuters. The Shanghai plant, Tesla's largest in terms of output, also serves as a key export hub to Europe and Southeast Asia. "Today is my last day at Tesla and I feel extremely fortunate to have worked and fought with everyone on this plot of land," Song wrote. The reasons behind Song's departure have not been immediately clarified, but his exit coincides with a pause in plans to expand the Shanghai plant. According to Bloomberg, Fei Wenjin, who was recently promoted from director to senior director of quality, will temporarily take over Song's responsibilities.