这个ceiling，找到一段话To ensure that employees earning the same annual salary receive the same CPF contributions regardless of their salary structure, the CPF monthly salary ceiling will eventually be set at one-twelfth of the CPF annual salary ceiling at steady state. 最终目标是简化成monthly ceiling，年度的就是乘以12。到时候就不关奖金什么事了。现在改到8000后离37740已不远，再增加一次就不需要37740了。