【中文版】

投资银行是专门从事金融服务业务的机构，主要为企业、政府和个人提供证券承销、并购、重组、咨询等金融服务。

投资银行的业务范围包括证券承销、企业融资、并购重组、交易与销售、资产管理等。其中，证券承销是投资银行最基础的业务之一，它包括股票、债券等证券的发行和承销，帮助企业通过证券发行筹集资金。企业融资是投资银行提供的一种金融服务，包括直接融资和间接融资，帮助企业解决资金问题。并购重组是投资银行提供的一种服务，帮助企业通过合并、收购、剥离等方式优化业务组合，提高企业价值。交易与销售是投资银行为客户买卖证券、进行资产管理和配置等提供服务。资产管理是投资银行为客户提供的一种服务，帮助客户进行资产管理和配置，提高客户的资产收益。

投资银行在金融市场中扮演着重要的角色，它们是企业进行融资和投资的重要渠道。随着金融市场的不断发展和完善，投资银行也在不断扩大业务范围和规模，成为金融市场中不可或缺的一部分。

【英文版】

Investment banks are institutions specializing in financial services, mainly providing securities underwriting, mergers and acquisitions, restructuring, and consulting services for enterprises, governments, and individuals.

The business scope of investment banks includes securities underwriting, corporate finance, mergers and acquisitions, trading and sales, asset management, etc. Securities underwriting is one of the most basic businesses of investment banks, including the issuance and underwriting of stocks, bonds and other securities, helping companies raise funds through securities issuance. Corporate finance is a financial service provided by investment banks, including direct finance and indirect finance, helping companies solve funding problems. Mergers and acquisitions are services provided by investment banks to help companies optimize their business combinations through merging, acquiring, divesting, etc., to enhance corporate value. Trading and sales are services provided by investment banks to buy and sell securities for customers, perform asset management and configuration, etc. Asset management is a service provided by investment banks to help customers perform asset management and configuration to increase asset income.

Investment banks play an important role in the financial market. They are important channels for companies to raise funds and invest. With the continuous development and improvement of the financial market, investment banks are also continuously expanding their business scope and scale, becoming an indispensable part of the financial market.