193号段timeline+无卡闯关

timeline:
3.6 case received
7.1 card being produced
7.5 card was mailed to you
Detroit入关：
问：你来干什么
答：上班
问：用opt吗
答：对
问：你的卡呢？
答：on its way
然后就敲章了。只看了i20和护照