Hua Rumo still knows some of these construction works. Although the servant of the Ministry said that this is just a gate, if it is really done, the underwater gate is so easy to repair.

in addition, it will take time to make sure that there is no leakage of water. It is absolutely impossible to complete the pouring of proper gate with molten iron in half a day.

the flower frowns like a stranger, but the mind never stops thinking. It's OK to pollute the water in the moat, but if it pollutes the water in the whole city People will die in three days without water, and if...