Treading the Heavens Without a Trace.

Summary

To cultivate 5 million acres of farmland north of Hengshan City, 200,000 able-bodied workers are needed, totaling around 500,000 to 600,000 people. Skilled craftsmen can be transferred from Liquan, but nearly 200,000 more workers are required. The region is under stable rule, making migration difficult. Achieving high-quality iron and copper production in five years is feasible due to local resources, but the ambitious production targets for transport vehicles and crossbows exceed current capabilities. The Tianji Academy faces limitations in obtaining tempered gold iron, and the demand for refined materials is unsustainable. Chen Hai's innovations in crossbow design significantly reduce iron requirements, but the overall supply chain challenges remain critical for military readiness.

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