Now if we want to draw the electric field lines in the medium then I can't follow one of the rules which is:
The electric field lines density crossing any particular area represents magnitude of field; means mores density means more field.
Actually you can draw the field lines and follow this rule. There are charges in some distance around the origin. And hence there are field lines beginning at these charges. Just remember, positive charges, if present, are places where electric field lines begin (and negative charges, if present, are places where they end).