150 Hours

In September, 2017, Sun, an university professor, initiated a competitive charity event, aimed at building lavatories for female teachers who work in financially struggling school of Yunnan Province. Seven amateur runners have to run 400-km to cross the depopulated zone in Qinghai within 150 hours. As long as one of them is able to cover the whole journey within the time limit, a sum of money can be raised.
(Source: IMDb)