Contact Us Hebei Messi Biology Co., Ltd. Fixed telephone(0086)3193907618 Email[email protected] WhatsApp(0086)13730395125 Phone(0086)13730395125(WeChat) LocationNo. 19, Xinwang Street, High-tech Zone, Xingtai City, Hebei Province Magnesia Supplier Office hours are 8:00 AM to 5:00 PM Monday through Friday Beijing Time.