Daily Millions, Spend Only in the County?

24-year-old Su Chen, a wage slave in a first-tier city, worked 996 for three years with less than 50k in savings. After being laid off, exhausted, he decisively resigned and returned to his hometown Qingxi County (county with 600k permanent residents, extremely low prices, backward economy, over half of the population working outside, severely lacking consumption scenarios). After binding with the county system, he earns tens of millions daily, but can only spend within the county; payments fail outside. Su Chen's daily worry is how to spend tens of millions.