Soon after the FAT reopened its flight operations on April 18, 2011 following several years of suspension caused by financial troubles, the Tonlesap Airlines of Cambodia, headed by Lo Wen-hao, operated chartered flights between Taipei and Angkor Wat by using airplanes leased from the FAT. But the operation failed to run smoothly due mainly to Tonlesap Airlines declining to pay over NT$3 million in aviation fuel costs to the FAT, thus undermining the interests of passengers, sources said. Lo was recently sentenced by the Taipei District Court to six years and six months in prison for his alleged role in the FAT's earlier embezzlement schemes, according to a press statement.