中国式的大门全是两扇,正可作为载体供油漆书写之用。有的帝王之居、官府衙门、祠堂等处大门特大,又有门钉。此类大门前必有门柱,可供悬挂拱形抱柱式门联。至于老百姓家居的大门,往往把对联就书写在两扇门上,那是名副其实的门联了。中国的大小工商业店铺行业等,也常在大门口书写悬挂行业性质很强的联语。所以,可以把门联和行业联算作一类。 Chinese-style doors are all two, can be used as a carrier for painting purposes. Some of the emperors, government Yamen, ancestral hall door, such as large, there are nails. There must be a pillar in front of such a gate, which can be used for hanging arched pillars. As for the people’s home door, often couplets written in two doors, it is a veritable Union. China’s large-scale industrial and commercial shops, etc., are often written at the gate hanging strong nature of the industry association. Therefore, the door can be combined with the industry as a class.