India developed cultural relations with China through the propagation of Buddhism there. In the first century B.C. the Buddhist monks, Dharmaratna and Kasyapa Matanga, went to China and spent the rest of their lives there translating Buddhist texts into Chinese and preaching Buddhism among the people. By the third or the fourth century A.D., Buddhism became a widely popular religion in China. Afterwards too many Buddhist missionaries like Kumarajiva, Sangabhuti. Gyanabhadra, Buddhbhadra, Jiva Gupta, Dharma Gupta, Prabhakaramitra, Sudhakarasingha, etc., went to China. The same way, many Chinese pilgrims came to India, the most important of them being Fa-Hien, Hiuen-Tsang and I- tsing. Sangabhuti was the author of the commentary on the Sarvastivada Vinaya.