Who did Gu Yong learn calligraphy from?

Gu Yong studied calligraphy like Cai Yong. Gu Yong (168-243), the word sigh. Wuxian (now Suzhou, Jiangsu) people. From the end of Han Dynasty to the Three Kingdoms period, Wu was an important minister. Born in one of the four surnames, Jiangdong people and Wu people. Gu Yong was educated in Cai Yong when he was young, and was appointed as the county magistrate when he was weak. He has served as county magistrate in Lou, Qu 'a, Shangyu and other places, and has made achievements wherever he goes. He was appointed as Cheng of Huiji County, acting as the prefect and fighting against bandits. A few years later, Sun Quan's shogunate became Sashima. After that, he moved to Dali and served as a regular waiter, and received an official order to ban Yang Sui. Huang Wu four years (225 years), Xintai Chang. In the same year, he was promoted to Prime Minister and Ping Shangshu, and was appointed as Liling Hou. He has been a minister for nineteen years, and he has many words to correct his mistakes. In the sixth year of Chiwu (243), Gu Yong died at the age of 76. Sun took the clothes, hung them up and gave them a sigh of relief. Tang Yao Hui listed eight people, including Gu Yong, as eight gentlemen in Wei and Jin Dynasties.