To say the unsaid, with Erin's analysis, Yu Sheng did realize that among all the special materials used for mass-producing the human-like automata, his own blood seemed to be the least valuable, costing at most some time—about thirty minutes per "production" cycle.
But the good news is that he seems to temporarily not have to worry about the production volume of Erin—even though this output seems to have a natural bottleneck, Yu Sheng reckoned that in the short term, he shouldn't need to form an army of hundreds of thousands of puppets...
Just take it slow.
When the third mass-produced automaton sat up from the Alchemy Platform, Yu Sheng discovered that even the final step of the Spirit Injection Ceremony—"assigning a name"—could be handed over to the mass-produced machines in charge of the operations.