《资治通鉴·后唐纪·后唐纪一》
甲申，吴王又派遣司农卿洛阳人卢苹出使后唐，严可求预料到后唐帝要问卢苹些什么，教卢苹怎样回答。卢苹来到，果然都如严可求所料。
甲申，吴王复遣司农卿洛阳卢蘋来奉使，严可求豫料帝所问，教蘋应对，既至，皆如可求所料。
On Jiashshen, Wu Wang again sent Lu Ping, the Minister of Sinong in Luoyang, to the Later Tang Dynasty. Yan Keqiu expected that the emperor of the Later Tang Dynasty would ask Lu Ping something, and taught Lu Ping how to answer. Lu Ping came, and it was indeed as Yan Keqiu expected.