Do you "pre-prepare" your kids for school?

A two-month summer break sounds like freedom. But for many children in China, it comes with a new set of assignments: previewing lessons, completing workbooks, and preparing for the semester ahead. Parents see it as a way to get a head start, while experts warn that too much academic pressure can come at a cost. So how much preparation is helpful? On the show: Fei Fei, Steve & Yushun