The inn's accounting clerk was told abacus, and he was scolded as "trash" for holding half of his bad debts.
Until that night, the abacus beads suddenly seeped light, and the "ancient and modern account books" were smashed into his brain - modern financial techniques and millennium accounting loopholes all became his sword!
Three thousand taels of corrupt money were discovered from the wrong accounts of the inn, the salt merchant's conspiracy was overturned with cost accounting, and the unspoken rules of officialdom were shattered with the beads of the abacus.
The shrewd female accountant assisted in the case, and the gloomy Jin Yiwei secretly handed in a secret report. He stepped on the blood of corrupt officials and climbed up, and finally made the powerful people in the court kneel down and listen: "When this arithmetic bead rings, it is the new account of the Ming Dynasty!"