During last night's conversation between Yino and Changli, she had suddenly mentioned how late it was halfway through their talk, then used spirit speech to hypnotize Yino before leaving.
Yino could sense that Changli must have had some urgent matter to attend to. However, she had not finished explaining what she wanted to tell him, so she ultimately chose to use spirit speech to convey it concisely.
[Sleep.]
[When you wake, you will remember this Heavenly Mandate in your heart.]
After hearing these final two gentle whispers, Yino's vision immediately went dark and he felt so drowsy he could not keep his eyes open.
He could vaguely recall that halfway through last night's conversation, Changli had suddenly mentioned the late hour. She seemed to have some urgent business to handle, which was why she had used spirit speech to directly implant the unfinished explanation into Yino's mind before leaving.
