In the misty and rainy rivers and lakes, exchange the Yin and Yang Feng Shui boards in the treasure house of the Eight Diagrams, and start the mission of using saber to send Fuxi. After being repaired by the old carpenter, use the Yin and Yang Feng Shui Board of Ziqi Station to find the white-haired old man on the hidden map. After the trial, you can draw a sword and get the town card knife method.
Buy yin and yang feng shui dishes. You need to buy yin and yang feng shui plates in the game and in the gossip shop.
Find the old carpenter, get the Feng Shui board, find Dong Sanchuan to trigger the plot, and get the task of finding the old carpenter.
Repair the yin-yang feng shui pan. After finding the old carpenter, you need to submit repair materials to repair the Yin-Yang Feng Shui Pan.
Enter the hidden map, come to the purple gas station in rainy days, and open the hidden map with the gossip mirror.
Find the white-haired old man, find the hidden map, the white-haired old man in Guatai Mountain, and fight.
Pull out Fuxi knife. After playing with the white-haired old man, you can try to pull out the knife on the gossip desk.
Get the True Sect Knife Method. After pulling out the knife, find the old man to trigger the plot, and you can get the town card knife method.