How many day can we pick up the visa after the application?

Right now, I stay in ShenZhen,study chinese for 1 semester(from4April-10July).But the problem is I came to china with L(arrived on22March) it's mean my L will expire around 20April so, today I already go to PSB apply the X.I want to know when I can pick the X up because next week I have to go to GuangZhou and I don't want to have problem there
Thank you.