Yazhen Syringe C

Sky King Flats (Wuling 2nd Base in Jingyu Valley) 12/minute (Note: must have at least unlocked Wuling Depot Bus, have mining facility set up on ferrium mining spot for needed ferrium ores, supply the said ores to wuling through regional transfer feature from valley iv, and have the needed Wuling AIC plan researched)