A digital exhibition named 'Vietnam's Hoang Sa and Truong Sa: Historical and legal evidence' is being held at Ly Thuong Kiet and Nguyen Truong To high schools in La Gi township, the south-central province of Binh Thuan, on October 3-4.The activity aims at introducing and disseminating historical and legal documents and evidence affirming Vietnam's sovereignty over Hoang Sa (Paracel) and Truong Sa (Spratly) to the schools' teachers and students.Source: Vietnam News Agency Source: Vietnam News Agency