This text discussion mainly on a peace diplomacy establish with Liao dynasty from point of view of Sung Jen-tzung, to realize the role and action in the course of the contract named Shan Yuan of alliance made with Liao and Sung. After treaty of alliance was contracted, the long term peace of diplomacy of these two countries especially depended on mutual party to comply with every requirement needed on this contract sincerely, Sung Jen-tzung's effort in this repect is specially listed on this text.