Ubnd Huyen Hoang Sa Address: Hoang Sa - Phan Ba Phien Street, Tho Quang Ward, Son Tra District, Da Nang City Enterprise code: 0402255230 Phone: 02363822291 Representative: Nguyen Huu Loi Tho Quang Ward, Son Tra District, Da Nang CityFounding date: 23 - 1 - 1997