我所知道的大致进程:
We received your application for permanent residence on 某日. (收到申请的状态)
We reviewed your application and sent you a letter on 某日 Please consider delays in mail delivery before contacting us.
(申请表某日初审通过,给你发RN信)
Your application and supporting documents were received by the Hong Kong office. They are pending review. (收到你的补料,审理中)
Your application was reviewed and we started processing on 某日.(这个某日就是给你发体检表的时间)