Which episode is Yang Guo's return to sword burial practice?

When Yang Guo woke up, Wu Santong was very grateful to him. Yang Guo's poison of love flowers and the poison of ice spirit and silver needle dissolve each other, which can make Yang Guo live for a few more days. In order to study the toxicity of the flower of love, Wu Santong accompanied Master Tianzhu to the valley of despair. Master Tianzhu suggested that Yang Guo break off his relationship and let him get rid of it completely. And Zhen fled to the river, and they happened to meet little dragon girl. Zhen Bingzhi insisted on apologizing to the little dragon girl. Zhao Zhijing got into a fight with him and then took the opportunity to escape. Small and large weapons and Wu Santong went to the Valley of Despair to find an antidote. Guo Fu learned from two people that he had been betrothed to Yang Guo, and Guo Fu repeatedly explained that there was no such thing. Yang Guo explained to Guo Fu that he had said something carelessly, and he didn't mean it. Guo Fu asked Yang Guo about the whereabouts of Guo Xiang, and Yang Guo explained that he didn't take Guo Xiang to the Valley of Love. Guo Fu insulted the little dragon girl in front of Yang Guo, and Yang Guo was furious. Guo Fu told Yang Guo that Zhen had defiled the little dragon girl, and Yang Guo slapped him angrily and cut off Yang Guo's arm in a rage. Guo Fu immediately told Guo Jing that Huang Rong had wounded Yang Guo, and the three of them immediately went to Yang Guo to check the situation. But Yang Guo has left the room, and Guo Jing is angry with Guo Fu. Yang Guo lamented his bad life, so he went with the flow, and many people went out to look for him. Guo Jing is very worried about Yang Guo. Yang Guo was washed ashore by the river and had to heal himself. There are pythons in the Woods besieging the carved gods. Yang Guo saw them and went to help. Diao Ge and Yang Guo hit it off at once, healing Yang Guo's snake gall. Yang Guo fainted after eating snake gall. Brother Diao took him back to the cave and brought him food. Yang Guo was deeply moved when he discovered the relationship between lonely seeking defeat and Diao Ge in the cave. Brother Diao took Yang Guo to his lonely sword grave and showed him his lonely sword. ……