Why are Hong Kong children become fatter?

http://www.hkbu.edu.hk/~ccd/Publications/P040369-CCD-News-P.1-P.141.pdf#search='fat%20hong%20kong%20children'

It is because they eat well with too much nutrients and they are lack of exercise. They like to eat junk food. They prefer watching television, playing electronic games and sleeping rather than playing ball games and other sports. Their parents do not have much time to take care of them. The children are spoilt. The parents let them eat what they want and do not push them to do exercise. Some parents think that their children look cute and healthy only if they are chubby.