There is a description in the "Onjo-ji bunsho" (documents compiled by Onjoji Temple) that a welcome party was held at the guest house in the north part of Korokan when the monk Enchin returned to Japan after studying abroad by a ship owned by the merchant Enko LI (李延孝) in 858.
天安(日本)2年（858年）には留学僧円珍が商人李延孝の船で帰朝し、鴻臚館北館門楼で歓迎の宴が催されたと『園城寺文書』にある。