The envelope of a letter sent to Jiamusi reads like this:

1. Fill in the postal code of the recipient in the six small boxes above the envelope (generally in the upper left corner).

2. Fill in the sender's postal code in the six boxes at the bottom of the envelope (generally in the lower right corner).

Write the address of the recipient in the middle part of the envelope, which can occupy two lines and write the name of the recipient.

Write down the address of the sender in the last line.