What are the specific businesses of investment banks of securities companies? Is it divided into finance department, trading department and research department like a special investment bank?

Professional investment banks don't have such a department as the finance department ... There is no special investment bank in China, and investment banking is one of the businesses of securities companies. The main body is securities sponsorship underwriting business, which is the most traditional investment banking business. The classification of departments is different. Generally, there are investment banking department (specialized in stock financing), fixed income department (engaged in bond investment and financing), merger and reorganization department (engaged in merger and reorganization), sales and trading department (engaged in marketing and distribution) and research institute (engaged in analysis and research), which is probably the structure.