What should I write in a letter?

Writing a letter is a way to express thoughts, emotions, and information. It can be expressed through words, emoticons, pictures, and so on. Writing a letter should include the following contents: 1. To: Make clear the purpose of the letter and the recipient so that the reader knows who the writer is. 2. Call: Use the recipient's name or title to address the other party politely. 3. Body: At the beginning of the letter, express your greetings, blessings, or thanks. Then, explain the reason, purpose, and content of the letter. Finally, express your thanks again or end the letter. 4. Ending: At the end of the letter, express your gratitude, blessings, or suggestions to let the reader feel your sincerity and care. 5. Sign: Add your name, address, phone number, and other information at the end of the letter for the recipient to contact. The letter should be concise and clear so that the reader can understand the intention and content of the letter. At the same time, in the process of writing a letter, you should pay attention to politeness and use appropriate language and emojis to express your feelings.