For thousands of years, Vu obsessively searched for the secret of the ninth chevron and the Destiny. Vu learned that the ninth chevron would send people farther through the stargate than ever before, as well as the high power requirements needed to make it happen. Vu also learned of the name Destiny.
At some point, the Xi'an people had became liberated from System Lord Vu's reign and retained Vu's research. This made them a target of the Lucian Alliance. Vu's research, however, also became an interest to Stargate Command, who tried to aid the natives in defending Xi'an but failed. (SGU: "Icarus 1")
Nevertheless, the Tau'ri manage to get information from studying Vu's work prior to escaping the planet. This occurred shortly before the Icarus project. Which would begin the journey of the Destiny expedition. (SGU: "Icarus 1")
Personality and traits
Besides having an obsessed behavior with the Destiny and the ninth chevron, Vu was also secretive, as noted by Dr. Szu comments. This is also apparent in Vu's hidden treasury. Hiding knowledge away, in places already hidden.