Zhang Sanfeng combined martial arts with calligraphy, and taught Zhang Cuishan, the most intelligent of the seven Wudang heroes, the sword moves of "The Supreme of Wulin, the sword that slays dragons, commands the world, no one dares to disobey, if Yitian doesn't come out, who can compete with him" to him. After learning, Cuishan went down the mountain to find out the real culprit. Because Du Dagan was not doing a good job, Yin Susu pretended to be Zhang Cuishan and killed all the people in Longmen Escort Agency. Because he was hit by the plum blossom dart of Shaolin (Western Regions), he hated the whole family and went to Shaolin Temple to cause trouble. As a result, Cuishan was wrongly accused. Cuishan left Shaolin to find out the truth, and met Susu who was dressed exactly like him on the way. He knew that Susu had wronged him. But he was broad-minded and didn't care. In order to track down the real culprit who hurt Yu Sanxia, he boarded Susu's boat. Susu didn't mention the mosquito needle and the seven-star nail, but just showed Cuishan the dart poison. Cuishan wanted to treat her wounds for his third brother, but Susu got angry (why not just for me?), and used his internal energy to poison her body. Cuishan said she was willful and wanted to leave. Susu moaned, and Cuishan softened his heart and came back to treat her. But Susu asked him to apologize first. Cuishan only knew Miss Yin's name at this moment. Cuishan treated Susu's wounds (in the 2001 version, Susu took off her shirt, and Cuishan closed his eyes to avoid being naked; in the 1986 version, he did not take off his shirt). At this point, the seeds of love had been planted, and it was basically destined that Cuishan and Susu would both commit suicide.

The Shaolin sect mistakenly believed that Zhang Cuishan was responsible for the massacre and went to Wudang Mountain to seek revenge, accusing Zhang Sanfeng of harboring his disciples. Zhang claimed that Cuishan was missing and sent his disciples down the mountain to look for him.

After the Sky Eagle Cult seized the Dragon Slaying Sword from Yu Daying, they called all the sects to show off their power at Wangpan Mountain. Chang Tanzhu went to the meeting with Susu and Cuishan. Jiang Guo and Gao Zecheng of Kunlun Sect were jealous of Susu. Cuishan left the place of right and wrong, and went east to Jieshi to see the vast sea. Susu followed. The two talked about Master Zhang's martial arts: "A thousand miles away is not enough to lift his greatness; a thousand feet high is not enough to reach his depth."