Manipulating market prices to weaken competitors is a complex strategy with legal and ethical risks. In many countries and regions, such behavior may be considered anti-competitive and illegal. However, in theory, the following are some of the methods that may be used to weaken competitors' competitiveness: 1. **Predatory pricing**: By setting product prices very low, forcing competitors to also lower their prices, which may make it impossible for competitors to remain profitable. However, this strategy may cause financial pressure on its own and may be considered illegal in some jurisdictions. 2. **Bundling**: Bundling several products together to attract customers with a lower total price. This may put pressure on competitors who only sell one or a few of these products. 3. **Price discrimination**: Setting different prices for different customers or market areas, which may gain an advantage in markets where certain competitors are more vulnerable. 4. **Rebate and discount programs**: Offering large rebates or long-term discounts to attract customers and weaken competitors' customer base. 5. **Barriers to entry**: Raising the cost of competitors entering the market or expanding their business by controlling the supply chain or obtaining key resources. 6. **Market segmentation**: Privately reach agreements with competitors to divide the market by geographic region or consumer type, thereby reducing direct competition. (This is illegal in many places.) 7. **Build and use vertical integration advantages**: By controlling the upstream or downstream part of the supply chain, products can be provided at a lower cost or faster speed. However, it must be emphasized that these strategies must be implemented with extreme caution and in compliance with legal requirements. Antitrust laws and other relevant regulations usually have strict provisions on anti-competitive behavior, and violations may result in serious legal consequences and damage to corporate reputation. Therefore, companies should consult legal professionals to ensure compliance when considering any market strategy that may affect competitors.