Beast Taming Clan: I Have a Jade Book

As a member of a beast-taming clan, Ye Jingcheng has the opportunity to exchange contribution points for beasts. To everyone's surprise, he chooses a wounded fox among all the available beasts, which people believe won't make it. However, only Ye knows that the mysterious Jade Book inside his body can save the fox's life. — Description from novelcodex.org