Truong Mam Non Thi Tran Troi Huyen Hoanh Bo Address: Khu 4, Troi Town, Hoanh Bo District, Quang Ninh Province Enterprise code: 5700950239 Phone: 0203690074 Troi Town, Hoanh Bo District, Quang Ninh ProvinceFounding date: 4 - 10 - 2008