Were M3 and M4 written by a Chinese cinematographer and edited by a screenwriter
SELECT count(*) WHERE {
?x0 a ns:film.cinematographer .
?x0 ns:people.person.nationality ns:m.0d05w3 .
?x1 a ns:film.writer .
M3 ns:film.film.edited_by ?x1 .
M3 ns:film.film.written_by ?x0 .
M4 ns:film.film.edited_by ?x1 .
M4 ns:film.film.written_by ?x0
}