|Out of universe information|
Eleven thousand years ago a minor System Lord whose name is now lost to history enslaved a nomadic Chinese tribe who called themselves Zhenhuija. This particular Goa'uld was not adverse to train some of his people slaves to make them more productive. With typical Goa'uld arrogance, he rejected the possibility of education for all, no matter how educated Zhenhuija maybe they were still only human.
Less than a century later Zhenuija staged a revolt and killed his self-proclaimed master. They hijacked his spaceship and fled in search of an uninhabited world far from the Goa'uld. They called the planet, they eventually found heaven or "Shchinzenya" in Zhenuija dialect. They soon discovered a Stargate on the planet that scared them at first they had seen Stargate earlier and associate them with tyranny Goa'uld but it seemed non-functional and soon became monuments of their history as slaves. Zhenuija displayed space with similar suspicion: the sky was the intermediary of their former masters, and they feared meeting more of his kind. As their civilization developed built large construction projects within their solar system, but never sent out interstellar probes or ships colonization.
Instead, focus on Shchizenya and its immediate surroundings. Their crowing achievement was the development of a massively distributed nanite networks with limited capacity for decision making. Its first two orders PROTECT SHCHIZENYA and SURVIVE. Their technical sophistication helped finally end their civilization. Two thousand years ago Zhenuija discovered the scientific principles behind the Stargate and repaired the long-dead gate on their world. The plot triggered massive political unrest between those who wanted the Stargate closes permanently and those who wanted to exploit its potential. Words came to blows, and the argument soon rafted out of control. Eventually Zhenuija civilization destroyed in a seismic civil war. Survivors of the Civil War escaped to the underground city of Ketele. (RPG: "First Steps: The Stargate Unexplored Worlds Roleplaying Sourcebook")