紫禁城的高大、雄伟,与四座城门以及四隅角楼的点缀分不开,而整个外围环境的优美,又与护城河的陪衬密切相关。河水把天光云影和高耸的城门、角楼融合在一起,使紫禁城恰似天宫仙境一般。护城河不仅起到了防御作用,也起到了美化环境的作用,因此使护城河水保持流通,成为一条洁净的活水,就显得十分重要了。护城河水引自京西玉泉山,关于 The Forbidden City is tall and majestic. It is inseparable from the four gates and the corners of the four corners of the turret. The beautiful surrounding environment is closely related to the moat. River water to the sky clouds and towering gates, turret fusion together, so that the Forbidden City is just like Temple of Heaven in Wonderland in general. The moat has not only played a defensive role, but also played a role in beautifying the environment. Therefore, it is very important for the moat to maintain its circulation and become a clean living water. Moat water from West Beijing Yuquan Shan, on