Li Hejun has emerged as China’s richest man by virtue of his controlling ownership in Hanergy Thin Film Power Group, the publicly-listed and thinly traded unit of Hanergy Group. Hanergy Thin Film Power Group’s stock has increased by more than 400% in the last year even though it’s a solar company that produces a technology that currently makes up a small portion of the overall solar power industry and sells most of what it manufactures ...