As Dopey Guo said, the Society of Saints really wasn't a place just anyone could get into.
Logically speaking, there was no way that Odd Zhuo, as Director of the General Administration of 100 Schools as well as a judicial officer of Songhai city, could be unaware of it. If the Society of Saints made any move, he would probably be the first person in Songhai city to hear of it.
However, this Society of Saints didn't do things the normal way. The entire organization's existence had from the start in fact been classified as a state secret; it was under the direct administration of the Alliance of Ten Thousand Schools, and had already been running out of a small place for a period of time before it had gone public in the last two days. Odd Zhuo had only received this information when the Society of Saints ad had appeared on TV.