Reference : MM-1-17-42

Name of creator(s) : Michael Moerman

Scope and content : 17 June 1965 - The difference between the roof of Pingyao’s house and that of the headman. “Hong” is the distance between the center of one post and that of another. In the past carpenters used the “sok” as the unit of measurement for house building.

Extent and medium : Punch card