[ yī shǒu jiāo qián，yī shǒu jiāo huò ]

俗语。谓现钱买卖，不赊欠。《水浒传》第二一回：“我这里一手交钱，一手交货。你快把来两相交割！”李英儒《还我河山》第三六章：“一手交钱，一手交货。你先把代替的女人交出来！”

fig. to pay for what you want in cash; simple and direct transaction; lit. one hand exchanges the cash, the other the goods (idiom)