Group 1 - The core idea emphasizes the importance of foundational knowledge in investing and selecting the right funds, suggesting that solid fundamentals are essential for successful investment in funds [2] - The article introduces bond ETFs, which are funds that track bond indices and can be traded on the market, highlighting that they possess the fundamental characteristics of ETFs [3] Group 2 - The article promotes a special offer for new holders of Zhongtai Asset Management products, encouraging them to participate in a certification process to receive a reward [6]