What are the characteristics of Zhang Yu's calligraphy in Yuan Dynasty?

Zhang Yu (1283 ~ 1350), formerly known as Zezhi, was born in Zhen Juzhen, Qiantang (now Hangzhou, Zhejiang). He became a monk at the age of 20 and traveled all over the famous mountains in eastern Zhejiang. When I went to Maoshan at the age of 30, I was suddenly enlightened by Da Dong Jing. Then I went to Dadu. Respected by Xi Shu, he presided over the auxiliary truth view of Hangzhou West Lake. The calendar is dominated by Mao Shan's concept of worshipping longevity and Fu Yuan Palace. At the age of 60, he took off his robe and returned to Confucianism, living in seclusion in Hangzhou.

Zhang Yu was in Hangzhou in his early years. Because he could get to know each other and learn books from his attendants, he entered Songxuemen. Under the guidance of Zhao, he studied Li Yong's Monument to General Yunhui, and also studied Huai Su, Mi Fei and others. Because of Changyu's extremely high calligraphy, coupled with his detachment and extensive knowledge, he studied under Li Neng's "beautiful" (Ye Li's "Three Stories of Wild Goose Zhai"); Learning elements can "have their own ethos" (He Liang Jun's Four Friends Zhai Cong said); He can "not follow the furious habit of Nangong" (Wang Keyu Coral Network), and then "transform himself", becoming more and more heroic and forming a unique calligraphy style completely different from Zhao. If his early works, such as "Two Juequatrains" and "Seven Juequatrains", are still influenced by Zhao, then his later works, such as "Poems on Paintings" and "Climbing to the Top of Nanfeng Mountain", will never be graceful and peaceful, with natural brushwork and words opening and closing on the side, making the whole story clear and eye-catching. Yuan Hua commented: "Mr. Zhen Ju's poems are wonderful, and there is a kind of immortal spirit who believes in people who are not secular."