Xuanjing Bureau

The Xuanjing Bureau is an organisation from the novel The Langya List (introduced chapter 33 of the webnovel), the show Nirvana in Fire and the manhua.

No historical organisation was named thusly.

Xiao Jingyu suggested to the Emperor to close the Xuanjing Bureau, which lead Xia Jiang to conspire against him.

Adaptations
It is mentioned for the first time in episode 1 of the show. There are other named members, Junior Officer Tang and Junior Officer Kang.