边境货币兑换

[经] currency exchange at the border

biān jìng huò bì duì huàn ㄅㄧㄢ ㄐㄧㄥˋ ㄏㄨㄛˋ ㄅㄧˋ ㄉㄨㄟˋ ㄏㄨㄢˋ