The Hunter Association is a big organization that has excellent internal cohesion between its departments. That is to say, only highly confidential information could be successfully kept a secret within its walls.
The war between the Cardinal's assassin and Shen Yuan isn't exactly a state secret, plus the fact that Chairman Mao spoke highly about it during the press conference. It didn't take long before the minor details of the incident became well-known among the Hunter Association's agents.
"The fact that you lead a force to fight against 100 assassins without any casualties is a big deal among agents. You should know that the mortality of the agents is not inferior to the hunters who enter the dungeon. In fact, with the cruelty and craftiness of people, an agent's mission could be more dangerous. How many of them died in the process of capturing awakened killers҃— let alone trained assassins? There are too many to mention," Chairman Mao's clear voice echoed inside his office.