C212

The reason why Hua Mujin had changed Mu Qiu's appearance to her was to have her cooperate with him and sing this play at the empress dowager's banquet.

Actually, it was Hua Mujin who used a combination of physics and chemistry, used a bit of fog, and then used Mu Qiu to transform into her own shadow. That was the only way for him to have such an effect in the dark.

Furthermore