There is a certain probability of bloodline inheritance in the Immortal Family Simulator. Bloodline thinness can be divided by the sum of the total bloodline of the parents divided by 2. As long as it is greater than 200, there will be no thinning. The bloodline inheritance interval of the offspring is the sum of the parents' bloodline multiplied by 0.5. Multiply 1.5 with the total bloodline of your parents.
1. The probability of having thin bloodline is : the sum of parents’ bloodline/2. If the sum is greater than 200, the bloodline will not be thinned.
2. The bloodline inheritance interval of offspring is : (sum of parents’ bloodlines*0.5)~(sum of parents’ bloodlines*1.5)