The effect of sinking sunken courtyards in Tianjin

Quick answer：

The sinking of sunken courtyards in Tianjin refers to the process of filling in the courtyards to raise the ground level. This is usually done to combat urban flooding, improve drainage, and increase the usable land area. The effect of this project can include reduced flood risks, improved infrastructure, and enhanced urban aesthetics. The project involves careful planning and execution to minimize disruption to local communities.