Brokers mainly trade securities, and the main business of domestic brokers, namely securities companies, is the securities brokerage business in the secondary market. This can be seen from the large number of brokerage business departments in China. Secondly, securities companies in China will participate in the initial public offering (IPO) sponsorship business, helping enterprises to enter the stock capital market under the securities fair and financial supervision environment with the characteristics of the primary stage of socialism in China.

Investment banks mainly invest, mainly in self-operated business and trading. There are several main businesses that international investment banks do: corporate financing (IPO, M & amp； A) sales/trading (prop, ficc, equity), research (gcrt, etc.), and asset management. Among them, traditional business is the first two, but due to the recent decline in financial market volatility, high-value customers have a fierce risk aversion, and asset management has a booming trend.