When the open-ended graded fund has a premium in the secondary market, it can carry out premium arbitrage. The specific method of "blind split" is: purchase the parent fund share through the market on T day, confirm and split the share at the same time on T+ 1 day, and sell the A and B sub-shares on T+2 day respectively. In the actual operation process, whether it can be "blindly dismantled" depends on the regulations of the fund company. Customers can try to place an order, but success depends on the final confirmation result. Please check whether it is successful before the market opens the next day after the split/merger. If not, please operate again in time.