Sustainable Equity Investment is an investment in which a company acquires shares in an investee entity. A company's equity investment in another entity is usually considered to be held for the long term and is not intended to be liquidated at any time. The investing company acts as a shareholder in the investee company. Sustainable equity investments require a capital exit through the listing of the business, sale to a trading seller or acquisition of management. Through long-term equity investment in the investee company, the investing enterprise is able to participate in major decisions of the investee company and thus influence and control the investee company to adopt active operating policies and profit distribution plans. Sustainable equity investment is also an effective way to achieve diversification and reduce systemic risk in the industry.