1. Huang (Yellow): This is the first rank skill class and within each skill there is a further subclass as low/mid/high.
2. Xuan (Black): This is the second rank skill category. 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 (Earth): This is the third rank skill class. Though Di Level was only one grade better than High Xuan Level, the distance between the two was as wide as the grand canyon. With enough wealth and a bit of luck, one could occasionally obtain a High Xuan Dou Technique from a high-ranking auction. Yet a Di Level Dou Technique could be said to be priced beyond the market as it was once heard that in the imperial capital of Jia Ma Empire, the price of a Di Level Dou Technique had rocketed to a sky-high price of about ten million, which was equivalent to an entire year of taxes from the entire Jia Ma Empire.[1] Although it was merely one grade of difference, the price between the two was more than a hundred times. From this it could be seen that Xuan Level and Di Level were two completely different concepts.
4. Tian (Heaven): This is the fourth rank skill class, it is the highest and most powerful skill class and as with each skill class there is a further subclass as low/mid/high.
I'm making 2 more ranks for this fan fic.
5. Half-Di (Half-God): This is just a better and stronger version of Heaven class techniques.
6. True Di (Trur God): These technique can only be used by Dou Di and Orign Qi. Technique of these ranks are so strong that they can destroy the Dou Qi continent in a single hit. (Qi training method of this rank of used can dry the entire Dou Qi continent)
This ranking can also be applied to the Dou Qi practitioner's training methods (Dou Qi Method, or Gong Fu).