This proceeding reports the latest LHCb results on π-hadron decays featuring charmonium reso-
nances in the final states. This includes the branching fraction measurements of the π΅ 0 β π½/ππ 0
decay and the measurement of the πΆπ-violating parameters S and C in the π΅ 0 β ππΎ S 0 decays.

