There is no backslash in the string.
The \" combination is used to “escape” the doublequote to be able to use it in the string.
If you were writing "{"year":"2020"}" it where a syntax error, as there is no operator between "{" and the variable year, etc.
If you were printing the string "{\"year\":\"2020\",\"p\":\"1002\"}" you’d see {"year":"2020","p":"1002"}.
