Sunjian district

Hey everyone, I wonder if someone can help us. My buddy and I want to go into the Sunjiang District(Explorable). I found some information here. The part which interests me is:
We have finished the mission but we can't find this newly open gate. The only thing I can see which might fit this description is the draw bridge (to which we previously escorted the soldiers) to orginally gain access to the Sunjiang District mission. We went over the bridge but the only routes we can find just lead us away from the area.

I thought it would be like Zin Ku Corridor, where after you have finished the mission you can talk to the emperor's voice and then run back inside to talk to the emperor himself but I can't find anything like that here. Have we missed something glaringly obvious?

Any help would be greatly appreciated.

We just solved this one but it's too late to delete the post. The wiki was a little confusing, the entrance to the desired area is actually in the Zin Ku Corridor.

keep doing primary quests and some missions. I think u get there after u do the mission after the convocation i think in boreas sea bed.