1. theme or title: write a theme or title on the top or middle of the postcard, which can be related to Chinese medicine culture, such as Chinese herbal medicine, acupuncture, Chinese medicine theory, etc.
2. Recipient information: Write the name and address of the recipient in the upper left corner or upper right corner of the postcard to ensure legibility, including detailed address information such as province, city, street and house number.
3. Sender information: Write the sender's name and address in the lower left corner or lower right corner of the postcard, which is also clear and easy to read.
4. Content or greeting: In the middle of the postcard, write the content or greeting you want to express. It can be greeting, blessing, thanking or sharing some knowledge related to Chinese medicine culture.
5. Signature: Sign at the bottom of the postcard, which can be a real name or a nickname.