Yan Clan's estate was located near the Eastern border of Qishurg City. They were one of the oldest clans in the city. While other clans grew big and moved their estates to a better location, the Yan Clan didn't move. The reason was that they had created a secret escape route that tunneled through the underground to the outside of the city. This underground was built even before the city wall was erected.
Yan Clan kept this underground tunnel a secret. Aside from preparing it as an emergency exit, it was also their secret means of smuggling goods or people inside the city without going through the gate checkpoints. They used it sparingly, though, and only a select few knew about this secret tunnel. If this tunnel were discovered by the city authorities, they would be in huge trouble.
