Since 1986, the research and application of CAD database, GIS database, graphic database and other spatial database systems have been carried out. Since 1990, a new spatial database management system vista with visual query function has been researched and developed in close cooperation with Mexico University of technology. The system has two indexing mechanisms of B-tree and R-tree, which are built-in generic. It is suitable for the management of large objects and dynamic data with mixed object and relationship. On this platform, the project "visualized oil exploration information system" of the national science and Technology Commission of Mexico was completed, and it has been used in the Mexican oil company up to now. Relevant monographs have been published by Science Press. In 1998, with the support of the national science and Technology Commission of Mexico, the research and development of the secure spatial database was further carried out, and the functional modules such as embedded identity authentication, access control, audit tracking, and separation of three rights were realized. In recent years, with the support of NSFC and NSFC of Jiangsu Province, the role access control model with spatiotemporal characteristics and the secure disk model based on artificial immune algorithm have been studied, and a secure spatial database management system secvista with B1 level security characteristics has been developed. Since 2001, with the goal of developing high security database system, the hidden channel has been studied deeply. In 2002, 2004 and 2007, NSFC successively funded the establishment of computable space for quantitative description of hidden channels, and constructed a formal model of hidden channels, and proposed a new audit standard of hidden channels and an analysis method of hidden channels based on information flow tree. In 2009, it was also supported by the special scientific research fund of doctoral discipline points in Colleges and universities. It integrated the dynamic behavior reasoning technology into the research of hidden channel identification method, and used the combination of static analysis and dynamic analysis to accurately identify and explore the hidden channel.

After a long-term construction, a stable scientific research team has been formed in this direction, among which four academic backbones have gone abroad for further study, and the leader also serves as a member of the system software professional committee of the Chinese computer society.