Huang Class <黄阶低级/中级/高级> (Lowest): The most ordinary class of Dou Techniques.
Xuan Class <玄阶低级/中级/高级>: A High Xuan and Di class may merely have a one level distance, but the gap was just like that of the Heavens and the Earth. Most Xuan class Dou Techniques relied on the personal strength of the user to unleash its strength. However, a Di class Dou Technique was already able to rely on the natural energy to achieve an extermination-like destructive strength. One was a person and the other was the Heavens and Earth. There was basically no comparison between the two.[3]
Di Class <地阶低级/中级/高级>: A Dou Technique of this class was not only rare but it was also extremely difficult to practice. Back then, Xiao Yan had also suffered greatly when practicing the 'Flame Splitting Tsunami' despite having Yao Lao teaching him by the side in order to barely reach a low level mastery. When he practiced the 'Three Thousand Lightning Movement' some time earlier, he was also required to take the risk of undergoing the refining of his body with the wind-lightning strength. If Xiao Yan had not have the 'Green Lotus Core Flame' protecting his body, forget about reaching a low level mastery of the 'Three Thousand Lightning Movement', he would not be able to enter even the most initial entry level. From this, it was sufficient for one to see the frightening gap between that of the Xuan class Dou Techniques and the Di class Dou Techniques which could not be remedied.[3]
Tian Class <天阶低级/中级/高级> (Highest, Limitation of the Dou Qi Continent): The rarest class of Dou Techniques.