Jin was surprised by the sudden honesty of Yang Ling. Did she notice that Shu was collecting information on her so she decided to play the card of an honest businessman... or maybe she really wanted to start a partnership with Jin?
In spite of that, Shu did his job by transmitting the information to Jin as he continued with the dungeon instance. In addition, Ku Wai and Yang Ling were nevertheless closer to the true ending of this particular dungeon than anyone had ever been. Ku Wai had even understood the meaning of the 'Theatre' part in the title Music Theatre Dungeon instance.
Yang Ling was still sitting on the ground whilst holding onto the suitcase that Ku Wai had opened. She was so vulnerable and defenceless that she was almost begging to be a target and so Shu commanded Sandy to attack her. This time around though, Sandy looked at him and blasted her sand powers at Shu instead.