Besides, he did not think Xue Fangyang was sincere in wanting to marry his sister. Everything he did was for the artifact. Once he obtained it, Shang Ningluo would become a useless chess piece that could be discarded at any time.
However, Xue Fangyang had never considered that Shang Ningyi would no longer care about his sister if he could sacrifice her and marry her off as a chess piece.
Everything was for the sake of that artifact. Since Xue Fangyang could do it, why couldn't Shang Ningyi?
It was just Shang Ningluo. She had been causing trouble for him every day. He might as well marry her off to Xue Fangyang to buy time and gain his trust.
Once he obtained that artifact and became an inter-plane traveler in the future, wouldn't he have the final say over Huayan Peak?
When Shang Ningluo eventually returned, he could have the authority to let her marry whomever she wanted.
She could even marry Qian Jiyun. Who could say anything about it?