Xu Beihong (1895-1953), Han nationality, formerly known as Xu Shoukang, was born in Qiting Town, Yixing City, Jiangsu Province. Recognition: written by Beihong. Seal: Beihong. Two cows are eating grass leisurely under the tree. A shepherd boy is sitting on the tree and looking at the book in his hand. The dark green leaves are in sharp contrast with the withered grass on the ground, indicating that the shepherd boy is serious about studying. To warn readers to read carefully whenever possible.