中国古代砌砖技术十分巧妙,能够砌筑各种式样的砖壁体,有薄有厚,有高的墙壁,有低的砖墙,有侧脚墙(向内倾),也有倾壁式墙(壁体向外倾),同时还有弧墙,砌成圆状的,还有更古老的如万里长城,以及很大的石墙等。那么这些壁体在没有水泥的年代里,用什么灰浆可以粘住呢?中国在唐代以前 Ancient Chinese bricklaying technique is very clever, able to masonry various styles of brick wall, thin and thick, high walls, low brick wall, side foot wall (inward tilt), but also wall-type wall ( Wall outward), while there are arc walls, built round, as well as the more ancient Great Wall, as well as a large stone wall and so on. So these walls in the cement-free era, what mortar can stick it? China before the Tang Dynasty