like: mở hàng → →
to make the first sale of the day, give as a new year’s gift ☊ 
bán mở hàng cho ai ☊ to make the first purchase in the day (of something) from someone ☊ mở hàng ☊ to make the first sale of the day, give as a new year’s gift ☊ bán mở hàng cho ai ☊