What are the ancient books about Du Mu?

Du Mu is an official family, and his grandfather Du You was a prime minister. That's why I said, "Ten years of Yangzhou dream has won the name of a brothel." In this case, the contemporary Li Shangyin was forced, usually because of the sadness of "and a moment that should last forever, came and went before I knew it".

As for the "three links", they are Du You's Tongdian in Tang Dynasty, Zheng Qiao's Tongzhi in Song Dynasty and Ma Duanlin's General Examination of Literature in Yuan Dynasty. There is no such thing as "nine links", but generally refers to "ten links"-in addition to the above three kinds, there are the Qing Dynasty's Continued Link Dictionary (edited by Huang, Liu Yong), Continued Link Annals (edited by Huang, Liu Yong), Continued Link Literature General Examination (edited by Huang) and Qing Dynasty's Tongda Dictionary (Huang, Liu Yong)