C180

"Mom, wake up! Have you forgotten that I'm going to dance class at 9 o'clock today? " Xia Yuhan, who was still dreaming, was shaken awake by Xin'er.

"Ah — baby, what time is it?" Last night, Xia Yuhan had been thinking about how to do the best she could with the incense factory. She made a series of N plans, overturned N 1 plans, and finally finalized a perfect plan at 4 am