每日钉一下（上市公司的盈利长期上涨，为何股价还涨涨跌跌？）

Group 1 - The article emphasizes the importance of diversifying investments across different asset classes, including both RMB and foreign currency assets, as well as stocks and bonds [1] - It highlights that USD bonds are a significant component of this diversification strategy and poses the question of how to invest in USD bond funds [2] - A free course is offered to systematically introduce the knowledge of investing in USD bond funds, which can be accessed by adding a course assistant and responding with "USD Bond" [3] Group 2 - The article provides additional resources such as course notes and mind maps to facilitate efficient learning and understanding of the course content [3] - It encourages readers to click on the link to access a free family asset allocation course, indicating a broader educational initiative [4]