function PDF_language($orientation='P', $unit='mm', $format='A4')
	{
	    //Call parent constructor
	    $this->FPDF($orientation, $unit, $format);
	    //Initialization
		$this->AddGBhwFont('simsun','宋体');
		$this->AddGBhwFont('simhei','黑体');
		$this->AddGBhwFont('simkai','楷体_GB2312');
		$this->AddGBhwFont('sinfang','仿宋_GB2312');
		$this->out_charset = $GLOBALS['pdf_config']['charset'];
	}