Haoneng persists quality is life. After successfully obtained the certification of ISO9001-2000, Haoneng passes the strict review of TUV Reinland every year. From the purchase of raw materials to each production process, the international quality standards are strictly followed; Laboratory testing, online detection and manual control in the production process are carried out; We are equipped with advanced equipment, careful and meticulous operation are executed everyday to make sure the product are perfect which gives you a reliable safety guarantee.