回复：请问关于AP纸的问题

1。一张AP纸是否只能用一次？
--Usually for multiple use before it expires, unless you applied it for one time use.

2。在现有AP纸到期前能否申请并使用新的AP？（现有AP纸已用完,且距其失效日还有半年，这期间想回国一趟。）
--Yes, you can apply a new one and use it. But if your AP is still valid, why do you need to apply a new one? What do you mean for "AP纸已用完"?

多谢！
--you are welcome