If the United States were to increase tariffs on China, it would have various effects on both countries and potentially the global economy. Here are some potential consequences:

1. Trade Disruptions: Increased tariffs would create barriers to trade, leading to higher costs for imported goods from China. This could impact both Chinese exporters and American businesses reliant on Chinese imports. It may also disrupt global supply chains and lead to a decrease in overall trade volume.
  
2. Economic Impact: Tariffs can result in higher prices for imported goods, which could increase inflation and put a strain on consumers' purchasing power. Additionally, businesses may face increased costs for raw materials and components, affecting their profitability. Economists argue that such trade restrictions could hinder economic growth and potentially lead to job losses.

3. Retaliation: China may respond to increased tariffs by imposing its own retaliatory measures on American goods. This tit-for-tat approach can escalate tensions and further damage bilateral trade relationships. Both countries may suffer economic consequences as a result of retaliatory actions.

4. Global Economic Ripples: The interconnectedness of the global economy means that disruptions in one country can have far-reaching effects. Increased tariffs between the two largest economies, the United States and China, can negatively impact global trade, investment, and economic stability. Other countries that have strong trade links with either nation may also experience indirect effects.

5. Diplomatic Relations: Trade tensions and tariff disputes can strain diplomatic relations between countries. The United States and China have complex and multifaceted relationships beyond trade, including geopolitical considerations. Heightened trade tensions may lead to further strains in other areas, such as technology, security, and human rights.

It's important to note that the effects of increased tariffs are complex and multifaceted, depending on various factors such as the specific goods targeted, the magnitude of tariff increases, and the response from both sides. Real-world outcomes can differ from theoretical expectations, and the situation is subject to political negotiations and possible resolutions.