Hieun Tsang, the Chinese pilgrim, visited India during the reign of Harshavardhana with an aim of securing authentic Buddhist scripts. The Kannauj assembly (643 AD) was held in the honour of Hieun Tsang and to popularise Mahayana sect of Buddhism.
He stayed in India for about fifteen years and recorded his experience in his book ,’ Si-Yu-Ki’. The book throws lights on the religion, customs, traditions, etc. of the country.