凑单

凑单	còu dān	to pad an order; to add extra items to an order so as to reach the minimum spend required to use a coupon, get a discount or qualify for free shipping
凑	còu	to gather together, pool or collect / to happen by chance / to move close to / to exploit an opportunity
单	Shàn	surname Shan
单	chán	used in 单于
单	dān	bill / list / form / single / only / sole / odd number / CL:个