There were several ways to improve competitiveness within business: product quality, service, and price.
The citizens living in the current era only expected to keep themselves alive. High quality customer service meant nothing to them. What they aimed for was always to feed themselves with the least amount of money.
Therefore, the grain stores could only choose to decrease their prices if they ever intended to compete with Jiang Pengji. Ultimately, however, it helped Jiang Pengji achieve her goal if they decreased their prices.
Price battles were never fair. The one with the advantage could play harder while the competition grew more furious. The ones at a disadvantage could only let the others lead them by their noses. Her main goal had never been to make a profit, anyway.