Dongguan Huashengyi Environmental Purifying Technology Co., Ltd. E-post:sales@hsy-airfilter.comTillAllen: sales01@hsy-airfilter.com E-post:HSY_waimaobu@126.com Wechat och WhatsApp: +86 13266187584 (Allen) Whatsapp: +86 18985272474 Adress: No.113 new anyuan road, dongcheng district, dongguan city, Kina.