What do you think are the requirements for making hand-painted postcards?

First, prepare a piece of hard paper, and make sure there is a certain blank on the paper, so that you can draw the appropriate content on it. Draw a stamp pattern in the upper right corner of the paper, which is generally square and can have various flowers and words on it. Draw six small boxes in the upper left corner and the lower right corner of the postcard. Fill in the postal code of the receiving place in the upper box and the postal code of the sending place in the lower box. Write your own greetings in the appropriate place on the postcard, which can be one or two sentences or simple words. Leave the address and location of the recipient in the appropriate position, and you can draw two lines. You can write the words "the postman is the most handsome in a sunny day" on one edge of the postcard, so that the courier will be very happy to see it and I believe it will be delivered faster.