(4)《Enforcement regulation of income tax law of the people's republic of china for enterprises》
(carried out from 1st Jan. 2008)
The 88th law says that the qualified projects which are environmental and energy-efficient mentioned in the 27th law include public sewerage treatment, public waste treatment, comprehensive development and application of bio gas, transformation of energy conservation and emission reduction technologies, and desalination of sea water and so on. The detail conditions and range are formulated by relevant departments of the state council. The enterprises which undertake
environmental and energy-efficient projects are immured from business income taxes from 1st to 3rd years since the first income, and will enjoy an half cut of business income taxes from 4th to 6th years.