Grandpa Chu

After the true qi changed into a cyclone in his dantian, it continuously revolved, tickling him. After each rotation, both the quality and the quantity of the true qi in his dantian would increase.

Additionally, the qi and blood energy in his five apertures was endlessly pouring into his dantian as well, changing into true qi.

Unlike qi and blood, which was illusory, true qi was a material entity. The cultivator could directly perceive its existence through the senses, and if Shuhang were to stretch out his hand and feel his abdomen, he would feel the vibration caused by the rotating true qi.