Growth enterprise market, also known as the second board market, is a securities market that provides financing and growth opportunities for emerging and innovative enterprises. Companies listed on the Growth Enterprise Market usually have high growth potential, but the risks are relatively large. GEM stocks mainly include the following categories:

1. technology stocks: there are many technology companies on the gem, such as internet companies, software companies and big data companies. These enterprises usually have high technology content and great growth potential, but the risks are also relatively large.

2. Biomedical stocks: The biomedical industry has a high technical threshold and R&D investment, and there are also many biomedical enterprises in the GEM. These enterprises may bring higher profits, but they also face greater R&D risks and market competition.

3. New energy stocks: There are also many enterprises involved in the fields of new energy, clean energy and sustainable development in the GEM. These enterprises usually have high growth potential, but they also need to face the challenges of technological upgrading and market changes.

4. Other innovative industries: GEM also covers other innovative industries, such as education, culture and media. These enterprises usually have unique business models and growth potential, but they also need to face market changes and competitive pressures.

It should be noted that investing in GEM stocks requires high risks. Before investing, you should fully understand the company's business, financial situation, market competition and other factors, and consult professionals. At the same time, maintain a diversified investment strategy and reduce the risks brought by a single stock.