门,既是房屋的外檐装修,又是独立的建筑。入必由之,出必由之,于是,历史的风风雨雨,门总要首当其冲。民居的滚脊门楼、里巷的阊阖、寺庙的山门、都邑的城门楼子。独特的中国建筑。因“门”而愈发独特。宫门上巨大的门钉,横九纵九, Door, both house eaves decoration, but also an independent building. It must come by, out of the grounds, so the ups and downs of history, the door always bear the brunt. House rolling ridge gatehouse, Lane Lane 阊 阖 family, the temple’s gate, the town gate building. Unique Chinese architecture. Because of “door” and more unique. Palace door huge nail, horizontal nine vertical nine,