In the autumn of 2000, Yu settled in Beijing, engaged in calligraphy research and collection, and embarked on the road of calligraphy collection. I like calligraphy since I was a child. He studied under Mr Ouyang Xiu, and later under famous calligraphers such as Liu Bingsen and Shen Peng. Starting from the Tang stele, he immediately turned to the epitaph of the Northern Wei Dynasty, and later dabbled in seal script, official script, Oracle Bone Inscriptions and inscriptions on bronze. He often made running scripts, followed the two kings of France and took advantage of the kings. The cursive script is based on Wang Xizhi and Sun Zi, and influenced by Huang and Zhu Dian. The book is graceful and elegant in style.