Photo taken on Aug. 19, 2019 shows the construction site of the Vientiane to Vangvieng section of China-Laos expressway in Laos. China-Laos expressway is co-developed by China Yunnan Construction and Investment Holding Group (YCIH) Co., Ltd. and the Lao Ministry of Planning and Investment. The under-construction Vientiane to Vangvieng section stretches 109.1 kilometers and will save the tour from Vientiane to Vangvieng from 4 hours to 1.5 hours on drive. (Photo by Liu Ailun/Xinhua)

Photo taken on Aug. 19, 2019 shows the construction site of the Vientiane to Vangvieng section of China-Laos expressway in Laos. China-Laos expressway is co-developed by China Yunnan Construction and Investment Holding Group (YCIH) Co., Ltd. and the Lao Ministry of Planning and Investment. The under-construction Vientiane to Vangvieng section stretches 109.1 kilometers and will save the tour from Vientiane to Vangvieng from 4 hours to 1.5 hours on drive. (Photo by Liu Ailun/Xinhua)

Photo taken on Aug. 19, 2019 shows the construction site of the Vientiane to Vangvieng section of China-Laos expressway in Laos. China-Laos expressway is co-developed by China Yunnan Construction and Investment Holding Group (YCIH) Co., Ltd. and the Lao Ministry of Planning and Investment. The under-construction Vientiane to Vangvieng section stretches 109.1 kilometers and will save the tour from Vientiane to Vangvieng from 4 hours to 1.5 hours on drive. (Photo by Liu Ailun/Xinhua)

Photo taken on Aug. 19, 2019 shows the construction site of the Vientiane to Vangvieng section of China-Laos expressway in Laos. China-Laos expressway is co-developed by China Yunnan Construction and Investment Holding Group (YCIH) Co., Ltd. and the Lao Ministry of Planning and Investment. The under-construction Vientiane to Vangvieng section stretches 109.1 kilometers and will save the tour from Vientiane to Vangvieng from 4 hours to 1.5 hours on drive. (Photo by Liu Ailun/Xinhua)

Photo taken on Aug. 19, 2019 shows the construction site of the Vientiane to Vangvieng section of China-Laos expressway in Laos. China-Laos expressway is co-developed by China Yunnan Construction and Investment Holding Group (YCIH) Co., Ltd. and the Lao Ministry of Planning and Investment. The under-construction Vientiane to Vangvieng section stretches 109.1 kilometers and will save the tour from Vientiane to Vangvieng from 4 hours to 1.5 hours on drive. (Photo by Liu Ailun/Xinhua)

Photo taken on Aug. 19, 2019 shows the construction site of the Vientiane to Vangvieng section of China-Laos expressway in Laos. China-Laos expressway is co-developed by China Yunnan Construction and Investment Holding Group (YCIH) Co., Ltd. and the Lao Ministry of Planning and Investment. The under-construction Vientiane to Vangvieng section stretches 109.1 kilometers and will save the tour from Vientiane to Vangvieng from 4 hours to 1.5 hours on drive. (Photo by Liu Ailun/Xinhua)