Besides the physical changes, his breakthrough in Cultivation also greatly enhanced his perception and Spiritual Sense. He also understood why back in Tan City, Shen Yuan had detected him just because he had noticed something was wrong at the doorway and slowed his steps.
It was because his heartbeat and breathing had changed significantly. At the time, he hadn't practiced a Concealing Breath Technique. The changes were so subtle that even an External Refining Expert might not have noticed them, but to the senses of an Inner Master, they were glaringly obvious.
That was how Shen Yuan deduced that Yang Chan had realized something was amiss inside the room, threatening him just as he was thinking of leaving quietly.
Shen Yuan was severely injured back then, yet he could still do something like that. It just went to show how terrifying figures at the Inner Refining Grandmaster Level were.
