In intelligence work, the most important aspect is information gathering. If you're caught, it might not be very dangerous; you can make a deal or be bribed, as long as you have enough value.
Those without value might go to prison, but are rarely killed—this is an unspoken rule, because both sides have intelligence personnel.
Today you can kill my people, tomorrow I can kill yours. Doing so is a bit too bloody.
For intelligence agents, killing is a measure only taken when absolutely necessary.
This is why when Zhang Caixin killed someone in Australia, the overseas department was displeased.
The man surnamed Xu understood why the Wanderer's Association used the Barrett. According to intelligence, Feng Jun had gone to Ni Hong and killed several members of the Wanderer's Association, which was indeed a bit excessive.
