Ni Qing is laughing and left the emperor alone with his minister in the office. Apparently, Zhang is trying to diffuse the line and the fight with the soldier in front of the kitchen. There is a huge commotion creates by someone who disappears later on.
They do not realise that the commotion distracts Zhang focus so the head of the public kitchen can run away. Zhang manages to calm the commotion, but it is ending up with the runaway head of the public kitchen.
Jin Yu is going out to see the commotion to find the culprit has been run away. He is hitting the wall with his fist to vent his anger. He wants to kill the person who pretends in front of him earlier.
"DO not show off your emotion, your highness…. Pretend there is nothing happening. The wall has ear and eyes, your highness…" Zhao Yu is advising him about the situation.