How many spaces should be left before each paragraph in an English article?

There are generally two types of writing:

One is to leave two spaces before a paragraph, and there are no lines between paragraphs. It is the same as Chinese, there is a space at the beginning, and you can use the Tab key in Word Realize that in this format, there are no blank lines between each paragraph.

Writing in one type of top format, but there should be a blank line between paragraphs.

Usually both can be used, but the second type is generally used when taking the Yaes exam. These two formats cannot be mixed, that is, there cannot be both spaces at the beginning and blank lines between paragraphs.