Capital Patrols

The Capital Patrols is an organisation from the novel The Langya List (introduced chapter 68 of the webnovel), the show Nirvana in Fire and the manhua.

It's a military force in charge of the security of the capital Jinling, the defense of the city gates, the enforcement of the evening curfew, and dealing with any armed conflict. It's theoretically under the control of the Ministry of War, but Xie Yu being higher-ranked than Li Lin, that control was not effective.

Adaptations
It is mentioned for the first time in episode 2 of the show. It's called 巡防营 ( xúnfáng yíng ) instead.