Grave Robbing: I Transmigrated into the Fu Family's Last Orphan

This is my first novel, so I may have some issues with how I refer to the characters. Please bear with me.

Fu An is hit by a truck while saving a child. When he wakes up, he's become an orphan of the Fu family in a tomb-raiding world.

Bound to a Sign-In System, he defies fate with daily push-ups and frog jumps.

He meets Hei Xiazi for the first time and gets picked up by him, then is forced to treat Zhang Qiling's injuries.

"Master Hua, I can treat that wound!" Fu An takes out a silver needle, and Xie Yuchen raises an eyebrow.

Wu Xie leans closer. "Xiao An, why is your tattoo just like my Xiao Ge's?"

System: Host, your ring is engraved with