Truong Mam Non Hai Yen - Thanh Pho Mong Cai Address: Khu 4, Hai Yen Ward, Mong Cai City, Quang Ninh Province Enterprise code: 5700639489 Phone: 0203778985 Hai Yen Ward, Mong Cai City, Quang Ninh ProvinceFounding date: 8 - 3 - 2007