How to save paper

It is time to send cards to friends and relatives again! How about using the card you received last year, and add some reply to it? Just like you use e-mail.

提倡用去年的贺卡，直接加上回复，再邮寄过去，如同e-mail的回复功能，这样可以大大节约纸张，而且才有回忆的感觉。