C673 They Were Opposing Each Other

Yuwen Tian once again shifted his gaze to Qing Quan. This old man was unfathomable. There was nothing on his body that could conceal his Qi, but no one could see through his strength. He was using his Qi to conceal his Qi.

Even if he used the second tier of the medicine pupil, he would only be able to see that he was already a Primordial Spirit Stage. As for the level of the Primordial Spirit