Before he left, Ding Youtian hit him on the head three times with a bamboo stick. Ding Youtian didn't think much of it at the time. Later, when he was weaving straw mats with Jian Ning and chatting about Journey to the West, he suddenly had an epiphany.

"Why did my dear teacher suddenly change his mind?" After becoming a disciple, Ding Youtian became more respectful in his words and deeds, but Blind Liu was unhappy.

"I can change if I want to. Why not accept it? I just don't want to be bound by anything. You should keep talking to me the same way you did before. It's really troublesome!"

"Are you sure?" Ding Youtian's shoulders slumped. To be honest, he was not used to talking seriously to Blind Liu.

Blind Liu glared at him. "I'm most afraid of trouble. There's no fixed time for this class. I'll teach whenever I want. If you don't show up or are late one day, the master-disciple relationship will be severed. Do you remember this?"

"Aren't you being unreasonable?"

"I, the old blind man, will give you three kowtows." He was about to stand up and return the kowtows, which frightened Ding Youtian so much that he hurriedly said, "Okay, okay, okay! You have the final say, and I will obey you."

Blind Liu snorted, went into the house, took out a book and threw it to him, "Take it and read it first. If you don't understand, come and ask me."

Ding Youtian flipped it open and took a look. He was overjoyed. What Blind Liu gave him was a book about strategy. He had been very interested since he first heard Blind Liu tell him stories about strategy in his childhood.

Later, Ding Youtian went to town to study. Sometimes after school, he would run into Blind Liu. When he had doubts about what his teacher was saying, he would ask Liu about it on his way home. Liu would scold him for misinterpreting the sage's teachings and misleading his students. However, Ding Youtian would often understand the profound meaning of his explanations in just a few words and fully agree with them.

From that time on, he admired Blind Liu very much.