C537 Very Troublesome Feelings

Gu Hann had seen similar things in the past, but it was a pity that it was not as detailed as this book. This book also had quite a few annotations. Gu Hann recognized from the handwriting that these annotations were all written by Gu Qian.

The annotation was more useful than the content of the book. As Gu Hann looked at it, he could not help but become enchanted