Group 1 - Investors face arbitrage risks when participating in ETF investments due to market trading mechanisms and technical constraints, which can delay the completion of arbitrage [1] - Operational or technical risks may arise from system failures affecting normal trading processes, including errors in subscription and redemption lists or incorrect calculation of the indicative optimized portfolio value (IOPV) [1] - There is a delisting risk if an ETF no longer meets the listing requirements of the stock exchange or is terminated early by a resolution from fund shareholders [1] Group 2 - Investors should clarify their investment needs, including goals, plans, and the market or industry themes they wish to target, as ETFs primarily track the performance of underlying indices through full replication [2] - It is essential for investors to fully understand the risks associated with ETF investments by reviewing the "Risk Disclosure" section in the fund's prospectus [2] - Attention should be paid to the liquidity and tracking effectiveness of ETFs, with a preference for larger, more liquid ETFs that exhibit lower tracking errors [2]