Does the service procurement between two state-owned enterprises in Chengdu need public bidding?

Should open tender, in accordance with the spirit of the relevant government tender documents, more than a certain amount should be open tender, to create a fair and open competitive environment, to avoid corruption. Specific documents are:

People's Republic of China (PRC) Ministry of Finance Order

No. 18

The Measures for the Administration of Bidding for Government Procurement of Goods and Services have been discussed and passed at the executive meeting, and are hereby promulgated and shall come into force as of September 6, 2004.