To understand that the Golden Core Stage acts as a watershed in all of Qingzhou, one could say it is significant.
Even in the entire Wei Kingdom, and even in the stronger Huangyang Kingdom, the number of Golden Core Cultivators is extremely limited.
In such circumstances, once one enters the Golden Core Stage, one can be considered to have stepped into the ranks of High Order Cultivators.
At this level, not to mention dominating the whole of Qingzhou, at least within the bounds of an ordinary country, one can already move unhindered.
Tang Xiuyuan and the person in front of him joined the Commerce Alliance under the Tang Family to secure the limited Core Formation resources from within the family; managing a shop was a stable path for them.
Because managing a shop is relatively easy, and certainly safer than treasure hunting, it's just more time-consuming.