Du Qing Huan (2024)

Both are Republican Era mini dramas in which the FL is out for revenge against the ML who she wrongfully believes killed someone close to her. Both involve the FL stabbing the ML, losing/pretending to lose her mind, misunderstandings, and a hate/love relationship between the leads.

Same era and same actress. The vibe of the first episodes are similar. In both stories, the FML lives with a powerful military officer.