The original basement of the villa had been transformed into a training room by Chen Yan. Sitting on a meditation cushion, Chen Yan felt that his practice of the Primordial Qi Transport Technique had reached its limit for the day... His body could not absorb any more Primordial Qi.
This method of training required a gradual approach, transporting Primordial Qi into the body daily.
Each day would nourish a bit more, and while improving his cultivation, his body was continuously nourished by the Primordial Qi. As a result, his body's capacity for Primordial Qi would slowly increase over time.
From Chen Yan's perspective, he could practice the Primordial Qi Transport Technique up to six times a day. After six rounds, his "container" was full and could not accommodate more Primordial Qi.
However, with daily practice, the capacity of the container would expand very slowly, bit by tiny bit.