clue

Only two days passed after I received Atius Xiao's reply.
A young man with a broken arm came to the entrance of Wanbaolou.
After explaining his purpose, he was taken to the Hall of Ten Thousand Treasures.
Atius Xiao, who was wearing a gray robe and a gray mask, and Wang Tingchuan, who was dressed in the same way, walked into the Hall of Wanbao one after another.
The one-armed man said in a deep voice:
"I am the shopkeeper of the Jubao Pavilion in Tianta City. I have been ordered...