Foreign commodity stocks free tax zone, need not pay imports custom duty, passable freedom is exported, need to hand in memory to expend only with a few charge, but if should be entered, close condition criterion to need to pay custom duty. 外国商品存入保税区,不必缴纳进口关税,尚可自由出口,只需交纳存储费和少量费用,但假如要进入关境则需交纳关税。