Low is called the bench table, highly with city wall difference not many, but outside the prominent wall, all around has the crenel, is place which the patrol stands sentry.

低的叫墙台，高度与墙 多但突出墙外，四周有垛口，是巡逻放哨的。

The city is square, the fence is 12 meters or so high, build by laying bricks or stones of outside and total brick, build on the wall have crenel, there is moat outside the wall.

为形,墙高12米左右,外表全部砖砌,墙上筑有垛口,墙外有护河。