shāng / chǎng / mén / kǒu / yǒu / jǐ / gè / fǎn / quàn / huáng / niú / zhuān / mén / shōu / gòu / gòu / wù / quàn

商场门口有几个返券黄牛，专门收购购物券。

There are a few coupon scalpers at the mall entrance who specialize in buying up shopping coupons.