The format of writing a letter in English is as follows:

1. Letterhead: refers to the address and date of the sender, written in the upper right corner of the letter paper.

2. Title: refers to the address and title of the recipient. Write below the letterhead, starting on the left side of the paper. When writing to someone you know well, such as Wang Ming, use Dear Wang Ming or Dear Mr. Wang.

3. The body of the letter: refers to the main part of the letter, from the next line of the salutation to the closing sentence, with the first paragraph written at the top.

4. Conclusion: refers to the polite closing words below the text. Commonly used are Yours sincerely, Yours ever, or Yours or Yours truly, Truly Yours, etc.

5. Signature: refers to the signature of the sender, written below the conclusion.

6. Note: The address is from smallest to largest, and the date can be day-month-year, or month-day-year. For example: 30 Nanjing Road.