2019 OPT Timeline

Initial OPT, 272 号段 (从寄出到收到卡一共136天，应该是我这个号段很靠后的)

4/15: Case received
7/29: Change of Address
8/12: CoA Success
8/22: Case Approve
8/26: Card mailed to me
8/29: Card delivered by USPS