Zi Collection, Middle Volume, Page 150, Entry 09 Pronounced danghan (falling tone), same as "dǎn". Meaning: a door bolt. Zi Collection, Middle Volume, Page 150, Entry 10 Pronounced tanghan (falling tone), same as "tǎn". Meaning: a door bolt. "Yùpiān" explains it as a doorpost. Refers to a short wooden stake beside the door used to secure the door leaf.