The protagonist, Professor Sun, has been involved in public welfare activities for years. In a research visit, he learned that the inconvenience of toilets is also one of the important reasons why rural primary schools can’t retain teachers. Since then, it has always been his dream to construct a clean toilet for the primary schools in remote villages. But it can be done by himself alone. Professor Sun is passionate about sports and decides to raise 100,000 RMB for the construction of the toilet by launching the 150 hours through the no man’s plateau public welfare long-distance running event.