Once resentment was sown, it grew very easily.
Qi Feng was never generous by natural disposition. At such a moment, he obviously would not go easy on Mu Yuchen.
Gu Lingsha was still detained at the police station. Even after so long had passed, they could not find any reason to cleanse her of the crime. It was hard to even get her out on bail because technically she had committed a crime with clear evidence. He still not understand how it ended up being Gu Lingsha and not Xi Xiaye. In fact, according to Morrison's plan, it was not drugs but a hallucinogen, which was obviously targeted at Xi Xiaye.
That way, he could warn Mu Yuchen and give Gu Lingsha an explanation. Also, the other goal was to stop those reporters so that Xi Xiaye would believe he owed Qi Feng a favor. Alas, he could not have expected all these plans to be ruined!