How did greeting cards start?
The custom of sending greeting cards can be traced back to the ancient Chinese, who exchanged messages of good will to celebrate the New Year, and to the early Egyptians, who conveyed their greetings on papyrus scrolls. By the early 15th century, handmade paper greeting cards were being exchanged in Europe.
I have never thought that we are the beginner for this kind of tradition. But it is not common in china now. Hope someday this tradition will be back.