黄耳传书

Explanation: Yellow ear: dog name; book: letters. Yellow Dog people from mass-based book. Letter from home after passing metaphor. 　　Source: "Book of Jin Lu Chuan" There Jun dogs early machines, it is called yellow ears, and even love. Subsequently restrain apartment capital, long time no home to ask, ... ... machine is for the book while bamboo Yong Sheng Department of the neck, the dog find its way south to go, Suizhi his home, was reportedly also Luo. Subsequently that often. "