Group 1 - The report addresses key issues such as analyzing the yield spread between new and old bonds from the perspective of 30Y, 10Y government bonds, and 10Y policy bank bonds, as well as evaluating current trading opportunities for specific bonds [5][13] - The switching of active bonds is influenced by issuance plans, with the scale determining the active status for government bonds, while policy bank bonds rely more on market institutions' behaviors and preferences [5][6] - The new and old bond yield spread exhibits a cyclical pattern of "widening-convergence," where the spread typically widens after a new bond is issued and narrows as liquidity premiums are realized and new bonds are issued [5][14] Group 2 - For 30Y government bonds, the trading focus may remain on the larger scale bond 2500002.IB, while the trading opportunity for the new bond 2500006.IB may be limited due to its yield inversion with the active bond [5][25] - In the case of 10Y government bonds, if the fund redemption fee reform is implemented, the market attention may shift towards this bond type, with the new bond 250016.IB having the potential to become an active bond [31][35] - The 10Y policy bank bonds also show a similar pattern to government bonds, with the yield spread typically widening and then converging after switching, but the opportunities depend more on market sentiment and liquidity changes due to the lack of transparent issuance plans [43][47] Group 3 - The report suggests that investors should focus on structural opportunities, particularly monitoring the transition of 250016.IB to an active bond, especially in the context of potentially increased demand for self-managed bank allocations [48]