· "Rules on encouraging the development of software industry and integrated circuit industry", issued by General Office of State Council(2000), document No.18.

· "Essentials of action of promoting the software industry (2002-2005)", issued by General Office of State Council(2002), document No.47.

· "A notification of Tianjin Municipal Government about'A transmission of the enforcement instructions of Tianjin Science and Technology Committee on speeding up the development of Tianjin's software industry'", issued by Tianjin Municipal Government, document No.79.

· "Administrative methods of preferential taxation on value-added tax of software peoducts and integrated circuit products(Provisional)", Tianjin, issued by Tianjin National Tax Bureau[2001], document No.17.

· "Recognition standard and management methods of Tianjin software enterprises and integrated circuit enterprises", issued by Tianjin Science and Technology Committee[2001], document No.113.


The software enterprises which were certificated by "Double software certification" and entered in Tianjin National Software Cooperation Zone can enjoy some Preferential Policy, please look at "Charge detail of building hired in Tianjin national software cooperation zone" and "ADSL Expenses Standard".