Around the building is a four-meter-wide trench, in front of which is a suspension bridge, and the bottom wall is the mixture of clay, lime and brown sugar, solid and steady.

楼四周有四米宽的护楼壕沟，门前设有吊桥通行，其底墙生土掺拌有石灰、红糖，坚固无比。

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Around the building is a four-meter-wide trench, in front of which is a suspension bridge, and the bottom wall is the mixture of clay, lime and brown sugar, solid and steady.

楼四周有四米宽的护楼壕沟，门前设有吊桥通行，其底墙生土掺拌有石灰、红糖，坚固无比。

youdao