Photo taken on Oct. 31, 2018 shows two tank trucks during the hand over of 64 ton diesel from PetroChina to a Lao company at Laos-China border, in Boten, Laos, Oct. 31, 2018. With over 64 ton diesel, handed over from PetroChina to a Lao company at Laos-China border, the first export of Chinese refined oil to Lao market was made on Wednesday. (Xinhua/Liu Ailun)