Zhou Botong was dying to play the 'four people mutual combat', so he urged Guo Jing to train. He himself did not stop giving instructions and pointers. A few days later Guo Jing had mastered the mutual hands combat technique. Zhou Botong's delight was unspeakable. "Come, come!" he urged, "Your left hand and my left one form an alliance against your right hand and mine. Let us have a martial art contest."
Guo Jing was still young, how could this kind of game not interest him? Immediately his right hand fought Zhou Botong's left while his left hand fiercely fought Zhou Botong's right. Nobody had ever seen or heard about this kind of battle.
While they were fighting each other and themselves, Zhou Botong incessantly gave Guo Jing pointers on how to attack swiftly and fiercely, and how to form a stable defense. Guo Jing listened and committed each and every one of them in his memory.
Zhou Botong only wanted to have an interesting playtime, but Guo Jing's mind came up with other thoughts. One day when they were playing, he thought, "If our legs can also be divided, wouldn't two people be able to fight as eight individuals?" But he knew if he brought this up, Zhou Botong would go on indefinitely, so he refrained himself from saying anything.