章 495: Chapter 502: A Breakthrough

"Master, do these carvings represent some special meaning?"

These marks were quite hidden and looked as if they were unintentionally made, far from seeming to hold any special significance, which is why Qi Yun and his men failed to notice anything amiss when they were searching previously.

"These were left by madam," Han Yu felt immensely grateful. When they had discussed secret guards in the past, they unintentionally mentioned the idea of secret marks. His daughter-in-law had whimsically created one specifically for the two of them. He still remembered the proud and confident expression on his daughter-in-law's face as she boasted that even if others saw the secret mark, they would not be able to recognize it.