The mission failed, but there are other ways to try.
The frustrating part is that as soon as the third generation of the Song Clan returned, the clan's higher-ups started expressing dissatisfaction with an "outsider" holding power over the Song Clan.
Song Qingning is truly clever. She knows that those who dare to oppose her must have received Cangming Ancestor's tacit approval.
She couldn't be sure if Cangming Ancestor was aware of her secret plans to assassinate the third-generation disciples of the Song Clan.