People walk on the footpath along the Yellow River in Lanzhou, northwest China's Gansu Province, June 11, 2020. The footpath project which is under construction is expected to be put into use in early July this year. The footpath, with a length of 20 kilometers, will connect the parks and scenic spots along the Yellow River in Lanzhou. (Photo by Ma Xiping/Xinhua)

People walk on the footpath along the Yellow River in Lanzhou, northwest China's Gansu Province, June 11, 2020. The footpath project which is under construction is expected to be put into use in early July this year. The footpath, with a length of 20 kilometers, will connect the parks and scenic spots along the Yellow River in Lanzhou. (Photo by Ma Xiping/Xinhua)

Aerial photo taken on June 11, 2020 shows workers working at the construction site of the footpath along the Yellow River in Lanzhou, northwest China's Gansu Province. The footpath project which is under construction is expected to be put into use in early July this year. The footpath, with a length of 20 kilometers, will connect the parks and scenic spots along the Yellow River in Lanzhou. (Xinhua/Fan Peishen)

Aerial photo taken on June 11, 2020 shows workers working at the construction site of the footpath along the Yellow River in Lanzhou, northwest China's Gansu Province. The footpath project which is under construction is expected to be put into use in early July this year. The footpath, with a length of 20 kilometers, will connect the parks and scenic spots along the Yellow River in Lanzhou. (Xinhua/Fan Peishen)

A woman walks a dog on the footpath along the Yellow River in Lanzhou, northwest China's Gansu Province, June 11, 2020. The footpath project which is under construction is expected to be put into use in early July this year. The footpath, with a length of 20 kilometers, will connect the parks and scenic spots along the Yellow River in Lanzhou. (Photo by Ma Xiping/Xinhua)