Ye Yinping Location
In the south city you meet her when you win the hero conference and then walk out of the government office area into the street. Don’t use a pet to fast travel there, walk to the street from the door.
In the east city you encounter her when crossing one of the bridges. She asks you to help her catch a thief.
In the north city you encounter her in the government office. The 2 of you work together to solve a crime.
You can do these in any order but she only appears at the ye army camp after doing them.