C51 A Celebratory Feast

Yuu Kexi looked at Mammy Zhao suspiciously. She had seen this small notebook once. It was on the desk of Yuu Tianhai's study. Usually, his study was not allowed to be cleaned. How did Mammy Zhao get it?

Yuu Kexi flipped open the book. There were some numbers that she could not understand recorded in it. The arrangement was also very strange, but each page had a date marked on it.

"Mammy Zhao