Literature Reference: 《送韦秀才道冲赴制举》 —— 作者：刘禹锡 From 'Sending Scholar Wei Daochong to the Imperial Examination' by Liu Yuxi.
宿: Celestial Mansions.
龄: Age, number of years. When used in personal names, it often signifies high status and commands respect.
Meaning: Su Ling signifies enduring years, symbolizing lasting wisdom and experience.