public function gcj_encrypt($wgsLat, $wgsLon) {
		//if ($this->outOfChina($wgsLat, $wgsLon))
		if (!$this->isInChina($wgsLat, $wgsLon))
			return array('lat' => $wgsLat, 'lon' => $wgsLon);

		$d = $this->delta($wgsLat, $wgsLon);
		return array('lat' => $wgsLat + $d['lat'],'lon' => $wgsLon + $d['lon']);
	}