When the 13-year-old girl He Ye came to school, she received a letter - "Carpe+diem!" On the same day, at the weekend cram school, He Ye couldn't solve a Mathematical Olympiad problem. Suddenly, a boy in white walked to the blackboard under the setting sun and wrote out the complete algorithm. From that day on, He Ye began to receive letters and was exposed to surprises from the world. Guided by these mysterious letters, He Ye tried to understand these mysteries through the girl's understanding and acquired knowledge.
Purpose: Growth of independent women
