Chinese company Yingli Green Energy (aka Yingli Solar) announced a deal with OCI Chemical Corporation, under which OCI will supply Yingli with polysilicon for a period of five years. The dealy, valued at about USD 442 million, will be executed from 2011 to 2015, enabling Yinglu to have a steady inflow of polysilicon for its growing manufacturing base.

[source: Yingli Green Energy]