4VietIR Office in Hanoi and Ho Chi Minh CityOffice Space 301, 3rd floors, Shopping Mall, National Defence Academy block, Xuan La Ward, Tay Ho District, HanoiBlock A, Floor 2, A2.12 Department, Sky Center, 5B Pho Quang Street, 2 Ward, Tan Binh District, Ho Chi Minh CityNo.12 Trung Yen 6, Yen Hoa, Cau Giay, Hanoi