The wall - a solidly constructed gray brick structure more than six feet high, surrounding a stretch of wasteland a few blocks north of the Forbidden City - did not yield.

Pingyao city wall for the Ming Hongwu three years (1370) built, the circumference of 6.4 km, 12 meters high wall around the appearance of all brick, wall moat, deep and wide 4 meters.

However, using the same granite material as the Seoul City Wall was too direct and brick seemed to be the best solution at this scale of a house.