C676 Similar to Qigong

"He knows how to use his hidden strength." Zhang Feiyang said indifferently.

Bai Yifei did not understand, "What is hidden strength?"

"It's a technique that can strengthen your strength. It's similar to Qi Gong. However, in this world, there are very few people who possess this kind of hidden strength. If I kill him, there will be even less."

Bai Yifei: "..."

"Senior, that's an enemy