Grandmaster Chang.

Sun Yang sat at a small table, the scent of freshly brewed tea rose up from the copper pot on the table. An old man with a short beard and bushy eyebrows poured him a cup and settled back down into the seat across from him.

"So you found someone who can refine it?" The old man asked with a pleased expression.

"There's a problem." Sun Yang sighed and pulled out a jade bottle from his pocket. "The pill refiner claims he refined the recipe perfectly. However, the color and smell are different. I didn't want to scrape any powder to test it without your permission."

"Oh?" The old man smiled. "I see you spent some time researching how to test pills. None of the other information brokers bothered with these things before."

"My customers get nothing but the best service." Sun Yang chuckled. The only reason he knew how to test pills was because he had asked Li Jun how it was done. He didn't expect to be praised for that bit of knowledge.