Dongguan Huashengyi Environmental Purifying Technology Co., Ltd. E-mail:sales@hsy-airfilter.comDoAlen: sales01@hsy-airfilter.com E-mail:HSY_waimaobu@126.com Wechat i WhatsApp: +86 13266187584 (Allen) Whatsapp: +86 18985272474 Adresa: No.113 New Anyuan Road, okrug Dongcheng, grad Dongguan, Kina.