Brick won't work, if you're going to build a wall, you have to plaster it on the outside, otherwise after ten or twenty years those bricks will loosen.,Seeing the old man's hesitation, Yan Laowu decisively drew his knife and said: "Old man, blue bricks are 20,300 per unit, red bricks are 20,800 per unit, a total of 48,000.",Someone asked, "Yan Er, are there still many stones like this in the quarry"。