The word 改造 is formed by combining two meaningful characters: 改 (gǎi), which carries the core idea of "to change" or "to alter", and 造 (zào), which conveys "to make", "to build", or "to create". Their union creates a compound concept where 改 modifies the action of 造, resulting in the synthesized meaning of "to remake" or "to transform", essentially, the act of changing something by re-making or reconstructing it.