The Secret Board (2018)

Gao Yunlong (Ruan Songyang), a special agent from the Shenzhou Bureau, is sent to the Ming Dynasty to find his colleague Cao Xiaomei (Chen Jiaxuan), who arrived there previously. His mission involves uncovering a conspiracy related to time and space disruption. He becomes involved in the conflict between the Donglin Academy and the Dongchang. Members of the Donglin Academy are murdered one by one, but the killer remains unknown. Eventually, Ye Jingqing (Song Tingyi), the eldest brother of the academy, confesses to the emperor, leading the court to accuse the East Factory. This event brings a sense of justice, and Gao Yunlong decides to remain in the Ming Dynasty to continue his work.