Gu Yang sent a copy of the audio she had sent to Gu Jin to Feng Jue. [I recorded it at home previously. If you can't sleep, you can listen to it.]
Although she had specially recorded it for Gu Jin.
After all, it was impossible for her to play a lullaby for Gu Jin every day. Gu Jin's sleep disorder was so serious that the medicine was ineffective and she had to be hypnotized. That was why she specially recorded a lullaby for Gu Jin.
Gu Yang thought about it and sent Feng Jue a few audio files. They were the other piano pieces she played.
Feng Jue: [Thank you, Big Sister! Your singing is so good!]
Hence, the next day, when Gu Jin woke up at six o'clock sharp, she found out that Feng Jue had revoked the blacklisting on her and shared a few audio recordings.
They were all piano pieces played by Gu Yang.
Gu Jin decisively saved the audio and blacklisted Feng Jue.