As an all-rounded master, Jiang Beiran had to go out during the day to trigger the option. At night, he had to work on his pills, formations, forging, and so on. Most of the time, he had his hands full. He did not have the time to go down the mountain to collect all the rare materials that were difficult to obtain in the sect.
Therefore, Jiang Beiran had no choice but to carefully select a few outstanding "errand boys.".
Wu Qingce was the first person that Jiang Beiran selected. Firstly, this second-generation hero had a head-on battle with him. So, Wu Qingce was one of a few who knew a small part of Jiang Beiran's true strength.
Secondly, a year after the incident, Wu Qingce had indeed kept his mouth shut and had never revealed Jiang Beiran's strength to anyone.