Coi Village, Phu Tho, possesses a beauty that is known as a "rough gem" shining brightly in the middle of the wild natural mountains and forests, about 5km from the center of Tan Son district. This famous village of Phu Tho is home to more than 90 households, all of whom are Dao Tien ethnic group. The Dao ethnic group living in Coi Village mainly makes a living by farming, terraced fields and free-range livestock raising.