I think I find the answer– wp-include/post.php:
if ( ! in_array( $post_status, array( 'inherit', 'private' ) ) )
$post_status="inherit";
So, whatever status will be saved as “inherit”.
I think I find the answer– wp-include/post.php:
if ( ! in_array( $post_status, array( 'inherit', 'private' ) ) )
$post_status="inherit";
So, whatever status will be saved as “inherit”.