中国故宫护城河美景 Beautiful Scenery Of The Moat Of The Forbidden City Of China Stock Photography

北京故宫护城河俗称筒子河,开挖于明朝永乐初年,距城墙20米,条石叠砌驳岸,坚固陡直,宽52米,水深5米,周长约三千八百四十米,平均蓄水量逾54万立方米。The Forbidden City moat in Beijing, commonly known as the Tongzi River, was excavated in the early years of Yongle in the Ming Dynasty. It is 20 meters away from the city wall. It is a solid and steep stone revetment with a width of 52 meters, a water depth of 5 meters, a circumference of about 3840 meters, and an average storage capacity of more than 540000 cubic meters.