According to what you said, it should not be called property distribution, but the distribution of Party B's legacy after his death.
Specific to the issue of inheritance distribution, China's laws stipulate as follows: the first heirs are: spouse, parents and children. As long as there is an heir from the beginning, it will not be given to others.
When you say that a couple has been married for less than half a year and one of them dies unexpectedly, then his inheritance should be inherited by this person first: his spouse, parents and children. The first heir negotiates or shares equally.
You can continue to consult if you have any questions. If you are satisfied, please adopt it.