Hello! ! ! The method can be like this. First, you add 7-star and 8-star cards (there are 3 cards in total). If the success rate is not above 50%, you can only use four-leaf clovers to increase the success rate (the ones with higher stars) Four-leaf clover, the higher the success rate). Finally, if it reaches more than 50%, there is a 1/2 chance that it is better for you to choose insurance. If it reaches 70%, you don’t need insurance, because the failure rate is relatively small. Low, you can use this method, that's what I do.