Human Medicine Gu

In Han village, Fang Yuan finds Gu worms modifying Han Li’s flesh and blood and reads the arrangement as Doctor Mo refining this Gu. Doctor Mo is the rank two healing Gu Master stationed in the village, and Fang Yuan judges he wants the finished Gu for his own lifespan. ^{ch. 676}

Refinement

A human child is the main refinement material, and the process takes years of slow nurturing. While it runs, the child’s body is secretly modified, vitality rises enough that choking death can be reversed easily, and a monitoring Gu lets Doctor Mo track the child. Fang Yuan estimates three to four years remain until finishing, and he leaves Doctor Mo alone so Han Li stays alive under that care. ^{ch. 676}

Effect

Once refined, the Gu can be used only once to increase a person’s lifespan, and the text names huge drawbacks on that use. ^{ch. 676}