A long position refers to an investment strategy where investors buy and hold assets with the expectation that prices will rise to generate profits. It reflects confidence in market growth and has a long history of widespread application. With the development of the internet and financial technology, the barriers to establishing long positions have decreased, enhancing market stability. However, there is also a risk of bubbles, especially when the market is overly optimistic. In recent years, investors have begun to favor establishing long positions in high Environmental, Social, and Governance (ESG) rating companies, reflecting a focus on sustainability. As a core strategy, long positions will continue to influence investment practices and market development.