
Sightseeing speedboats are anchored on the Yellow River in Lanzhou, capital of northwest China's Gansu Province, May 9, 2017. (Xinhua/Fan Peishen)

Sightseeing speedboats are anchored on the Yellow River in Lanzhou, capital of northwest China's Gansu Province, May 9, 2017. (Xinhua/Fan Peishen)