Mr. Cheng actually didn't know exactly what had happened, but since Boss had issued a strict order, and he was a professional, of course, he had come over early in the morning without question.
Even though Mr. Cheng didn't know what had happened, from what he knew about Boss, it was likely that Boss had messed up, and he was just there to clean up the mess and had to figure out what exactly had happened on his own.
Mr. Cheng had used all his skills in conversation but couldn't get any useful information from Xu Ning, so he had no choice but to wait for Su Lu to arrive.
Su Lu couldn't come, she had felt very uncomfortable last night so Su Zhe didn't let her go back, but instead took her to the hospital, where Cheng Youran administered a 654-2 injection.
Then they let her go home, fortunately Suzhe, Qiao Li, and Cheng Youran were all medical students, so they didn't make a big fuss, and after giving the injection, they sent her home to rest.