Cao Zeng
Cao was a book collector in the Eastern Han Dynasty. The word is Bo mountain. Jiyin (today's Shandong Dingtao, Heze area) people. His real name was Cao Ping. Because he admired Zeng Shen's morality, he changed his name to Zeng Ping.
Life of the characters
His family is rich and he provides food for those who are poor in recruiting apprentices. The family has a very rich collection of books, up to 10000 volumes. At that time, the world's famous books, since ancient times, the text errors, are corrected. At the beginning of Guangwu period (about 25 years), the world was in chaos. He was afraid that the ancient books would be annihilated because of the chaos of war. He used to store books by accumulating stones, which was known as "Cao's Library". After the official to advise the doctor, as many as 3000 disciples.
Historical records
Volume 79 of the later Han Dynasty
Chinese PinYin : Cao Ceng
Cao Zeng