报个OPT timeline供参考

10.4 USCIS received
10.11 notice from Potomac service center received
12.11 card is being produced
12.13 card mailed
12.15 card received

经过这几天看地里的信息以及自己用case tracker查，发现圣诞节前有一大批制卡发卡的。70天仿佛是个坎儿，一般会有更新。卡一旦寄出确实是以priority mail的形式，如果注册USPS的Informed delivery，它会出现在package里，所以只有周日不会投递。

希望大家都都能顺利收到卡，等待真的很煎熬，深怕出什么岔子。好运！