As follows:

1. Letterhead.

2. Date.

3. The address in the letter.

4. Title.

5. Text.

6. Concluding remarks.

7. Signature.

The difference between letters and letters

1. Different meanings

Letter: understanding, following people, following words. People's speech should be honest, letters, letters (Late Uprising. Letters in the pre-Qin and Han Dynasties were also represented by the word "book").

Han: pictogram, today it is mistakenly called letter. Original meaning: tongue. A letter conveying news or instructions (ancient wooden letter for mailing).

2. Different occasions

Letter means news and is mostly used in general meaning, such as correspondence, letters, oral messages, etc. The more meaning of letters lies in the written meaning, such as invitation letters, letters and phone calls, etc. It is a more formal style. Sometimes it is general, such as letters, letterheads, correspondence, etc.