The Chang Tang military was willing to let Durin visit their munitions factory. Durin was elated—after all, according to Old Man, Chang Tang had three major munitions factories, all of them massive automated factories from the old century. They were those near-miraculous facilities that could process raw materials into finished goods with incredible efficiency.
Only then did Durin truly understand Director Sun and her team's intentions—while the Western Lands' European Union folks have their brilliant strategies, the Eastern Land's Huaxia people also have their own clever maneuvers.
This saying isn't wrong; it was an insight taught by Eleven, reportedly derived from proverbs passed down from the Ancient Era.
In Durin's era, many such proverbs had been lost.
And so, Durin brought his Melinda, and under the military's escort vehicle, entered Shangjing's Underground City, encountering the giant underground shelter in Shangjing.