Quảng Bình , formerly Tiên Bình under the reign of Lê Trung Hưng of the Lê dynasty (this province was renamed Quảng Bình in 1604), is a province along Vietnam's north-central coast.
Located in the North Central Coast region of Vietnam, Quảng Trị Province is surrounded by Quảng Bình Province to the north; Thừa Thiên-Huế Province to the south.
Tây Ninh Province locates between Ho Chi Minh City and Phnom Penh, in Southern Key Economic Zone and borders Cambodia to the west.
Thái Nguyên is a province in the Northeast region of Vietnam. It is a mountainous, midland province with a natural land area of 3,526.64 square kilometres (1,361.64 sq mi)
Yên Bái is a province located in Tây Bắc, the northern part of northern-central Vietnam. It shares borders with six provinces which are Hà Giang Province, Lào Cai Province, Lai Châu Province, Sơn La Province, Phú Thọ Province, and Tuyên Quang