server {
	.
	.
	.
	
	if ( $ip2location_country_code = CN ) {
		set $need_block Y;
	}

	if ( $remote_addr = 1.2.3.4 ) {
		set $need_block N;
	}

	if ( $need_block = Y ) {
		return 403;
		break;
	}

	.
	.
	.
}