Group 1 - The core viewpoint of the article emphasizes that the long-term average annual return of the A-share market is around 10%, and through stock fund selection, excess returns can be achieved [3] - The stock fund selection process involves choosing stocks with stronger profitability among thousands of listed companies, which can enhance overall returns [4] - The total index of stock funds reflects the overall performance of all stock funds in the A-share market, with a long-term average annual return of approximately 11%-13%, outperforming the overall market index by 1%-3% [5][6] Group 2 - Not all stock funds in the A-share market have strong long-term performance; however, those with stable investment styles tend to yield better results [7] - Selecting experienced and high-performing fund managers can lead to further excess returns, with some managers achieving long-term annualized returns exceeding 15% [7] - Building a diversified investment portfolio and rebalancing it can enhance returns based on the three sources of income mentioned [8]