The men chosen to lead China into outer space are often referred to locally as "superhuman beings" — and not just because they train to cross the final frontier. Would-be taikonauts have to meet near impossible standards that are meant to weed out the less-than-flawless. Chinese astronauts cannot suffer from chronic sore throats or runny noses. They mustn't have food restrictions, strong regional accents, ringworm, cavities or scars. Bad breath, body odor and a snoring problem are all immediate disqualifiers. And if China's spacemen are expected to satisfy an unlikely string of qualifications, so too are its new spacewomen —...