The most powerful kung fu in Gu Long's novel varies from person to person because every character has their own unique personality, background, and goals. The following are some of the martial arts that are widely regarded as the most powerful: [1. Unrequited Love Valley Swordsmanship: It was created by Ximen Chuixue. He uses sword qi to kill people mercilessly and no one can stop him.] [2. Flying Flower and Falling Leaves Sword Technique: It was created by Ye Kai to defeat the enemy with fast and accurate sword moves. The unique style is refreshing.] 3. Snowflake Goddess Swordsmanship: The swordsmanship created by Lu Xiaofeng is exquisite, fast, flexible, and unpredictable. 4. Little Li Flying Dagger: It was created by Li Xunhuan. It killed many enemies with a simple and precise knife technique. It was known as the first knife in the Jianghu. 5. Plum Blossom Blade Technique: It was created by Mei Niansheng. The unique style of the blade technique is exquisite. It's amazing to use softness to overcome hardness. Each of these martial arts had its own unique characteristics and charm. Different readers might have different views and evaluations of these martial arts.