Being a design institute originally under direct control of Ministry of Communication our corporation either as a chief editing unit or participating unit. has prepared over 50 standard specifications of State and Communication industry , standard drawing, general drawing and preparation of 4 types of products standards of communication industry. Thus, our corporation is one of the originators of standard specification system of China communication industry .Since 2002 the project of standard renewal and revision is extensively launched and we have taken charge of the revision work of many volumes of important bridge design specifications. 6 books of specifications and 2 books of product standard have already been completed. And compling and preparation of another 6 books of specifications and 2 books of product standard will be finished in the next 3 years.