A retired Sanda athlete traveled through time and became the frail and sick He Yuzhu in the courtyard in 1943. He was nine years old and could not beat Jia Dongxu. Until one day he dreamed of an old man, a first-generation master of Bajiquan. His last words before his death were: "I have not killed enough with all my skills." When he woke up, there were nine more layers of seals in his body, and each layer was a complete level of skill. From then on, Bingyangzi from Nanluogu Lane began to practice boxing at night and pretend to be weak during the day. Saito Ichimonji, the 8th Dan of Japanese Kendo, heard that there was a "child boxer" in Peiping who crippled three of his disciples, so he went to visit the courtyard in person - he saw a sallow-looking child feeding chickens in the courtyard, and he didn't believe that this was the person he was looking for. What he didn't know was that this kid's punch was enough to break his saber.