Six months late, but the brown envelope finally arrives.  Once you are logged in in China, they will send you a brown envelope that contains my "GUZ" number (Guangzhou Case Number), all the information about the paperwork that needs to be filled out before you get to China and a letter stating what to expect once I get to China.  (If I didn't get this, my agency has the same information).  Not everyone gets the brown envelope but it is nice for me to have it especially for Maggie's scrapbook.  It also makes the adoption seem a little more real now!