Green Door In Shennong Street

I was walking the Shennong street. The good old atmosphere was well preserved in this street. And it was flanked by the old low-rise buildings. The green door in this photo belonged to one of the buildings.

It was closed tightly. So I thought this shop was closed when I stood in front of the door. A placard was hung on it. And something was written in Chinese. Although I walked away after shooting, I later learned that the description on the placard indicated the door was open.