Needed. Urumqi project nature, scale, location, the adoption of pollution prevention and control measures have undergone significant changes, need to re-execute the environmental impact assessment procedures. Environmental impact assessment, referred to as EIA, refers to the development activities in the region (due to changes in the utilization of land, etc.) to the environmental quality of the impact of the evaluation, and based on this proposed to take preventive and control measures and countermeasures.