It is a common practice for officials in China to use their power to extort money. Now even elementary school students have learned to do so.
According to an article that People’s Daily recently republished, a Deputy Class Leader who is a sixth grade student was found to have been extorting money from his classmates since the year he was in the second grade. This student leader was assigned the "power" to check other students’ homework. If a student didn’t give him money, he would tear up that student’s homework and report bad things about that student to teacher. He also forced some students who didn’t give him money to drink urine or eat excrement.
Source: People’s Daily Online, May 8, 2015