I hope your question is legitimate and that you're not trying to be sarcastic or something.

1. China does not "ban" children, however, there is a monetary penalty imposed on families having additional children.  Also, the family might not be able to gain legal recognition of the child's birth (i.e., birth certificate, family register inclusion etc.). 

2.  The Shanghai government has lifted the one-child rule for  bonafide Shanghai residents and in fact are promoting a 2-child policy here due to a dwindling "local" population.

Also, you should be thankful for China's one child policy because there are 1.4 billion Chinese here.  If the government lifted the rule and let people do as they please then that number would increase exponentially and cause a lot more problem than hurting someone's feelings about having an only child. 

I believe most Americans have been brainwashed one way or the other about China.  Some people believe it's a socialist utopia with streets paved in gold others believe "Big Brother" is standing over you, watching every move you make with a gun to your head.  Both are completely wrong. 

China cannot be stopped. All the wishful thinking in the world won't stop Chinese from becoming a greater economic, political and military force in the world.  However, the continued introduciton of capitalism will be and has been the single greatest force for positive change in China's political and social landscape.

I also suspect this CNN reporter is lying through her teeth about this incident.  First, I don't have a clue as to what she means by "security guards".  The only security guards I know about are the one's that hang out at shopping mall organizing bicycles, the one's sleeping at the gates to residential compounds and the one's that mill around banks.  I suspect she was in a place/location that filming was not allowed or hindered pedestrian traffic and was asked to leave and being the arrogant shit that CNN reporters are known to be refused to go.  Also, there is no such thing as being "detained" on the street for two hours.  She's sensationalizing a mere encounter with authorities that took two hours to resolve.  This can be often seen in bar street fights an traffic accidents, when all the parties stand around and argue for hours.  You certainly don't call this "being detained".  Her report is highly suspect and perhaps CNN saw an opportunity to make it look like the Oba Mao t-shirt is not accepted in China.

"Race doesn't matter..liberals are only one color - YELLOW"

"Somewhere, deep in the jungles of Kenya, a village is missing its idiot."