While Chu Xing was introducing Zhang Lin to the Hidden Sea Palace environment, Zhang Fei and Shen Yu had already arrived near the Yin-Yang Pavilion, but he did not immediately bring her into the sect.
After pondering for a long time, Zhang Fei decided to try something. He immediately used his invisibility before touching Shen Yu's hand, but nothing happened. To their surprise, his ability affected her as soon as he held her hand, and she also entered the invisible state just like him.
"Wow! Your ability is really amazing, Fei!" Shen Yu exclaimed in admiration. "I thought you could enter anywhere in this realm with this ability, except for the rooms equipped with strong defensive formations."