It's important to make a distinction between the two cases I mentioned. In the case of former, I first met the boy when he was a ten-year-old living in Shanghai; he was a quiet boy and very obedient to his parents. This was something I noticed concerning other children and it's due to the teachings of Confucius that pervade Chinese society. Confucius exhorted his people to follow, among other things, filial piety:
While China has always had a diversity of religious beliefs, filial piety has been common to almost all of them; historian Hugh D.R. Baker calls respect for the family the only element common to almost all Chinese believers.
It's not something the average Chinese person thinks about, it's second nature, so it's easier to get a child to follow his parents' wishes without using force.
In the second case, the girl was born and raised in London and has therefore never been subjected to this subtle persuasion that is part of the Chinese experience: hence, her refusal.

