(BEIJING) -- Fly on a Chinese airline and you will be pampered by flight attendants who look eerily alike. They are young, beautiful and practically the same height. This is not a coffee-tea-or-me stereotype, but the result of a rigorous selection process that is more beauty pageant than equal-opportunity job interview. If you're older than 24, don't bother applying. If you aren't taller than the average Chinese woman, go home. And if your legs are similar to tree trunks, don't call. Sound like a throwback to the dark ages of workplace discrimination? Here, in the world's fastest-growing aviation market, entry...