一九八四年第四期《古建园林技术》,曾有路长同志《龙口》一文,介绍了古建筑施工中屋脊(穴瓦)瓦“合龙”的仪式及镇物。关于此仪式及镇物内容,清代国家工程常留有档案记录甚详,今摘录一二,以补《龙口》一文不垒之处。关于合龙,堤坝合口,石桥、券座中心券石即龙门券的安装,也都称为合龙,一般均为工程巨典,属于国家重大工程的,常须由钦天 In the fourth issue of “Architectural Techniques of Ancient Architecture” in 1984, Comrade Lu Changchang wrote “Longkou” and introduced the rituals and townships of the roof (hole tile), tile, and “helong” in the construction of ancient buildings. With regard to this ceremony and the content of the township, the national project in the Qing Dynasty often has very detailed records of records. This is an excerpt from January 2 to the end of the “Longkou” article. The installation of Longmen vouchers, namely, Helong, Dike-Bakou, Shiqiao, and Depot Coupons, is also called Helong. It is generally an engineering giant and belongs to national major projects. It is often required by Qintian.