请qǐng 先xiān 在zài 登记单dēngjìdān 上shàng 写xiě 名字míngzi。qǐng xiān zài dēngjìdān shàng xiě míngzi.Please write your name on the registration form first.Breakdown of qǐng xiān zài dēngjìdān shàng xiě míngzi.名字míngzimíngziname在zàizàiat写xiěxiěto write先xiānxiānfirst