(CPV) - Commenting on the contributions of comrade Dao Duy Tung to the Party's ideological work, General Secretary Nguyen Phu Trong said: "In more than 50 years of revolutionary activities, comrade Dao Duy Tung has spent more than 30 years doing ideological and theoretical work. This is a very difficult and complicated field, but it is in this field that comrade Dao Duy Tung has made great contributions and left very good and deep impressions...".