Does the practice of Wuzhuang add value to Yu Yan's swordsmanship?

No, according to official website's query on Fantasy Westward Journey, the Wu-shaped Guan Yanyu Sword Technique in Fantasy Westward Journey belongs to physical attack skills, and its damage effect is only related to factors such as skill level, attack power and opponent's defense, and has nothing to do with spell cultivation. The Buddhist practice of Wuzhuangguan has no bonus to misty rain fencing. Fantasy Westward Journey is a classic online game developed by China Netease Company. It is based on the ancient myths and legends of China, and integrates the traditional turn-based fighting and role-playing elements. The world view and character setting of the game are deeply loved by players, with a huge player group and a highly active community.