《辽史·列传·卷十六》
适逢宋派遣使者增加岁币以代替十县，再次与耶律仁先出使宋，确定以 进贡 为名，宋不肯。
会宋遣使增岁币以易十县，复与耶律仁先使宋，定 进贡 名，宋难之。
When Song sent an envoy to increase the annual tribute in lieu of the ten counties, he went to Song with Yelü Renxian to finalize the deal in the name of "tribute," but Song refused.