Judging exactly how hard to push has, so far, been one of Ms Hu's greatest strengths.

ECONOMIST: How scared should corporate China be of Hu Shuli?

Founder and CEO Julia Hu created a wristband that wakes you silently so your partner can sleep in, and tracks your sleep to help you discover how you compare.

FORBES: Trade In Your Recalled Jawbone UP Product For A LARK

So far this is mostly equipment and supplies shipped overseas for fish fanciers and wholesalers, and Qian Hu has invested in aquarium-gear providers in the U.K. and India.

FORBES: Magazine Article