Turning failure into a business

When you work hard preparing for a test, but still ending up failing, it can be upsetting. But Huang Hongchuan turned one such unpleasant experience into a promising business idea.

In late October, the former City University of Hong Kong graduate became one of the youngest entrepreneurs in Forbes China's 30 Under 30 list.

During Huang's freshman year, he flunked a statistics course, while other students outperformed him without much effort.