Moon Shaking Immortal Palace had a rule: if the Saintess was away from her residence for more than three days, it had to be reported to the Palace Master, regardless of her destination. Even if she were going to the residence of the Moon Shaking Immortal Palace's own old ancestor, the Palace Master had to be informed.
This was because the Saintess's status was incredibly special; she was not permitted to come and go as she pleased.
Furthermore, Moon Shaking Immortal Palace had another, even stricter rule: colluding with an outside sect, for any reason whatsoever, would result in the most severe punishment—expulsion from the Sect!
Han Mei had broken both rules!
She had personally admitted to telling the Hai Family that Qin Li was in the Moon Shaking Immortal Palace. It was also she who left without notice, treating the Immortal Palace's rules as if they were nothing, to run and lodge a complaint with the old ancestor.
