The SongHua river has been polluted last week. The government has stopped the tap water, so the people in Harbin get some trouble about drinking the water. It is a difficult problem, because nobody can live well without the water. So the government tries its best to find the way to solve the problem.

　　At the same time, many cities give help to Harbin, hundreds of trucks transport the water to Harbin. Everybody needs others’ help when they get trouble. Like people, like city. Our country likes a big family; the city is the member of the family. Like the family, helping each other is responsibility of every member.