China hotel a showcase for Yingli Green Energy

Company charts a path for a future powered by solar energy.

I’M IN my hotel room. I draw back the curtains to find dark square cells embedded in the glass. This is unusual in all hotel rooms but not so in the Power Valley Jinjiang International Hotel in Baoding, in the Hebei province of China – this hotel is partly supported by solar power and the squares in my windows are actually solar cells.