1. Different definitions: A shares refer to stocks issued by companies listed in China, and their prices and transactions are regulated and managed by the China stock market. Growth Enterprise Market (GEM) refers to the securities trading market established in China to provide financing services for innovative small and medium-sized enterprises and entrepreneurial teams.

2. Different listing conditions: A-share listing conditions are strict, which need to meet certain financial indicators, operating conditions, governance structure and other requirements. The listing conditions of GEM are more relaxed, and more attention is paid to the company's growth potential and innovation ability.