Figures 1–3
From: Experimental study on the properties of modern blue clay brick for Kaifeng People's Conference Hall

Figure 1 Early completion of construction. Figure 2 Transformation by posterity. Figure 3 Expansion of shops outwards.
From: Experimental study on the properties of modern blue clay brick for Kaifeng People's Conference Hall

Figure 1 Early completion of construction. Figure 2 Transformation by posterity. Figure 3 Expansion of shops outwards.