I Can Read All the Way to the Sky

Outside Yanyang City, there is a hill, and halfway up the mountain is a tomb. There is a family at the foot of the mountain, where a middle-aged man with a gentle face lives and a girl. After the girl awakened her pulse when she was sixteen years old, she went to the middle-aged man and asked. "Can thirty-six thoughts really reach heaven?" The middle-aged man smiled and said, "Not enough." She asked again: "Not enough? How many recitations are needed?" He smiled and said, "Seven hundred and twenty thoughts." She asked again: "Why seven hundred and twenty thoughts?" He touched his head and said, "Because my thoughts can reach the sky."