This assumes that China has a strong legal system and that government officials won't abuse the system to meet arbitrary quotas. Neither of which are true.

http://www.pri.org/stories/2013-04-15/china-past-due-one-chi...

tl;dr Couple had the legal right and license to have a second child, but the local family planning officials were over quota so they made up some bullshit about her license being expired and forced her to abort her 8-month old fetus.