sentences:  Across the Mekong are Koh Suotin, Kampong Cham and Kampong Siem districts of neighboring Kampong Cham Province.The large Mekong island of Kaoh Samraong lies in the center of the district's western border.The Tboung Khmum district governor reports to His Excellency, the Governor of Tboung Khmum Province.