Yesterday I just figured out the arbitrage trick, and now the whole family has each deposited 500 yuan into their accounts, but the funds won't be released until the day after tomorrow. This time gap is a bit uncomfortable; if the market continues to decline tomorrow and hits the limit down, it will directly result in a loss. When I first started playing with this logic, I didn't think it through thoroughly. It seems that arbitrage looks simple, but in reality, the rhythm and timing are crucial. Being even slightly slow can easily get you trapped. Now, it all depends on whether I can exit smoothly the day after tomorrow.