Bắt đầu với một mô tả ngắn gọn nhưng chính xác trong tiêu đề email. Bắt đầu bằng một lời chào lịch sự trong nội dung email. Nhập nội dung email. Kết thúc email bằng một lời chào tạm biệt.

I'm interested in that, but I only have a few mins. Can you give me at most the first 500 characters of a detailed explanation in English about that?
This allows the recipient to quickly scan the subject before opening your email and it gives them enough information so they know what to expect. You should include whatever polite greeting you like, such as "Dear". Follow this with the recipient's name.  Left-align the salutation. If you are writing to a close friend you can dispense with the salutation completely and just begin with their first name followed by a comma. Include a blank line between the greeting and the body of your email. Like