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Head office according to business registration: B6-BT5 My Dinh 2 New Urban Area, My Dinh 2 Ward, Nam Tu Liem District, Hanoi City

Transaction address: 6th floor, Building of Vietnam Journalists Association, Duong Dinh Nghe Street, Yen Hoa Ward, Cau Giay District, Hanoi City, Vietnam.

Telephone: 024 37833660 - 024 38378866

Fax: 024 37833661

Email: infor@kosy.vn - Website: www.kosy.vn

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