The packaging bag has strong adaptability to temperature; has stable shape, strong light shielding property and excellent fragrance preservation at high temperature and low temperature. It effectively prevents the contents from moisture absorption and gasification, is insusceptible to invasion of bacteria and insects, has good shape stability, is not affected by humidity variations. Currently, packaging industry develops at high speed, our company will forge ahead and persistently pursue; sincerely serve all the customers with strict management, first-rate quality, honest and trustworthy operation.