The winner will be called a "handkerchief advocator," as it refers to green consumers who prefer to use handkerchiefs instead of throw-away paper tissues in support of low-carbon life.

The winner will be called a "handkerchief advocator," as it refers to green consumers who prefer to use handkerchiefs instead of throw-away paper tissues in support of low-carbon life。

Teachers prepared a number of props: an iron bar, a handkerchief, a piece of paper and a bottle of alcohol, there is a pot filled with water basin.