Sudan's Second Vice President Hasabo Mohammed Abdurrahman tonight opened Khartoum International Expo's 31st session under the theme "Sudan's land is the land of investment opportunities" with the participation of 14 countries and 600 local and foreign companies. The event will last until the sixth of February. Saudi ambassador to The Sudan Faisal bin Hamid Mualla and a number of officials and corporate executives attended the opening ceremony.