Benh Vien Da Khoa Huyen Yen Chau Address: Tieu Khu 5, Yen Chau Town, Yen Chau District, Son La Province Enterprise code: 5500374267 Phone: 02123840115 Yen Chau Town, Yen Chau District, Son La ProvinceFounding date: 3 - 7 - 2009