Who painted the two famous paintings "Return to the Pasture" and "Three Oxen"?

The painting "Returning to the Pasture" is the work of Li Keran, a famous Chinese landscape painter. The size of the painting is 69×46cm, and the inscriptions on the painting are: "Kerzan, Ruzi Niu, and Li Xiajiajie Guan." The author's signature is: "Kerzan, Ruzi Niu, and Li Xiajie Guan". The inscription on the painting reads: "Returning to the Pasture. Corrected by Comrade Yuan Hao, Kezan." Li Keran (1907 - 1907) was the first artist to be honored with the title. Li Keran (1907-1989), a native of Xuzhou, Jiangsu Province, studied traditional landscape painting at the age of thirteen under the tutelage of the township sage Qian Feizhi, and then enrolled in the Teacher Training Section of the Shanghai Private Art College at the age of sixteen. 1929, he was admitted to the Hangzhou Xihu National Academy of Fine Arts with honors, and was admitted to graduate school for the study of Western painting. 1943, he was recruited to serve as a lecturer at the Chongqing National College of Fine Arts and was engaged in the teaching and creation of Chinese paintings. 1946, he was recruited to serve as a lecturer for the national Peking University by Xu Beihong. In 1946, he was hired by Xu Beihong as a professor of Chinese painting at the Beiping National Academy of Fine Arts, where he also studied under Qi Baishi and Huang Binhong, and devoted himself to the study and creation of traditional national paintings. After the founding of New China, he further devoted himself to the innovation of Chinese painting. With the mottos of "The precious thing is the courage, the essential thing is the soul" and "Use the greatest strength to strike in, use the greatest courage to strike out", he gave new life to the ancient art of landscape painting. Mr. Keran's landscapes are deep, heavy, broad and majestic, and with a distinctive spirit of the times and artistic personality, he has promoted the transmutation and sublimation of traditional national painting. Mr. Keran's self-contained educational ideas formed the "Li Keran School", which is active in the painting world. He is not only a generation master who has been working hard in the painting field for more than 70 years, but also made important contributions to the development of artistic concepts. His influence has long transcended the art world, and he has been highly praised by all sides.

Three Bulls by Dai Song, birth and death dates unknown, Tang Dynasty painter. He was a disciple of Han Hwang, and was an inspector when Han Hwang was guarding the western part of Zhejiang Province. He was good at painting the scenery of the fields and the plains, and was especially famous for painting water buffaloes, which was said to have "the beauty of wildness, sinew and bone". Legend has it that he once painted a drinking cow, the reflection in the water, the lips and nose are connected, which can be seen in the observation of the subtle. His younger brother, Dai Yiyi, was good at painting water buffaloes. Li Rihua of the Ming Dynasty commented on his paintings, saying, "I know that the image of the object is not in the work of rigor, but through the God and the shortcut to take the ear." He and Han Gan's paintings of horses were known as "Han Ma Dai Niu". Heirloom works include "Bullfighting Figure".