Stars Viewing City was located in the northwest of Huaiyuan Prefecture where the largest slaves trade center of Huaiyuan Prefecture was situated.
The slave trade center in Stars Viewing City not only ranked first in Huaiyuan Prefecture, but was also very famous across the entire Waii Sub-Continent. The reason was that, besides the local slaves from Waii Sub-Continent, the slaves from other continents and some small, distant human settlements would also be transported to Huaiyuan Prefecture through overseas trade constantly and be transferred here through ports like Yiyang Port of Huaiyuan Prefecture.
Slaves were the 4th most popular trading commodity among humans in this age. According to many slave traders, the slave trade was an important system to optimize the general human resources allocation of mankind, maintain the survival of the fittest among people, and keep everyone energetic and enterprising.