Of course, most of Zhang Yanhang's fellow alchemists generally wouldn't use this to repair technological products. Instead, it's used for rapid repair of alchemical constructs and related battle magic statues during combat, and it can also be used to fix expired and damaged medicines.
Naturally, weapons and equipment can also be repaired, but as everyone knows, Zhang Yanhang is already at the peak of the Fourth Tier, yet has never had equipment that was damaged. In fact, not only were they never damaged, but the durability was never even dropped, so repair is simply unnecessary.
As for the durability of Resentment Puppets, it is single-use, belonging to the [Unrepairable] durability solidified by the Ashen World, which is clearly indicated in the attribute list.
