Vehicles run on a street in Lhasa, capital of southwest China's Tibet Autonomous Region, Feb. 12, 2018. Lhasa has put 128 new gas-electric hybrid buses on the road at the beginning of this year, making the number of new-energy buses to 312, or 60 percent of the city's public bus fleet, local authorities said Friday. (Xinhua/Yang Meiduo)

Citizens queue to get on a gas-electric hybrid bus in Lhasa, capital of southwest China's Tibet Autonomous Region, Feb. 12, 2018. Lhasa has put 128 new gas-electric hybrid buses on the road at the beginning of this year, making the number of new-energy buses to 312, or 60 percent of the city's public bus fleet, local authorities said Friday.(Xinhua/Yang Meiduo)

A gas-electric hybrid bus runs in front of the Potala Palace in Lhasa, capital of southwest China's Tibet Autonomous Region, Feb. 11, 2018. Lhasa has put 128 new gas-electric hybrid buses on the road at the beginning of this year, making the number of new-energy buses to 312, or 60 percent of the city's public bus fleet, local authorities said Friday.(Xinhua/Yang Meiduo)

Editor: Xiang Bo