I saw those when I picked up char siu. They looked doughier, like the ones at Tianjin.
We also had one inside the little mall on Roosevelt, the dough was flaky there (I like these better, but those were better than Tianjin imo, and also I may be responding to the filling too).
There’s also a new place on Kissena that I meant to stop by but I didn’t have time.
