The divine soul energy is something that even Bai Lixue herself, who has an extremely special eye, has not been able to see before she has connected with his soul.
Very few people can see it, as it is extremely special and has a very high level of energy, but this girl in front of him...
Since she met him, she was able to see a little about his true appearance. She could see his silver eyes and hair when he couldn't even cultivate.
And Tang Yin believed that she could see his soul in some way or another. After much thought, she figured that couldn't be the case, as Divine Soul and its constitution were special.
He understood this after obtaining the Divine Mind. The Divine Soul is not as simple as he or the people of his world came to think.
Still, his understanding did not give him enough to understand her in-depth, but it made him understand that not just anyone could see it.