Gu Chen sat cross-legged on the bed with his body's Gangqi circulating along the path of the Great Sun True Skill, gradually becoming increasingly intense.
After all, the Great Sun True Skill was a superior internal skill. Merely the purity of its Gangqi far surpassed that of the Pure Yang Wuji Gong, and its power was even greater.
If Gu Chen could cultivate the unique Great Sun Gangqi, once his skills deepened, he would truly possess the power to burn mountains and boil seas.
As for how to cultivate the Great Sun Gangqi, this secret manual only recorded that one must have profound skills to an extraordinary degree, then condense all the Gangqi into a single point, transforming it into a "fire seed," and then polish and ignite it using a special method to have the slightest chance of achieving Great Sun Gangqi.
Of course, there was also a relatively simple way to convert the internal Gangqi into Great Sun Gangqi, which was through the Sun Flame Stone.