Organs don’t last last. However, I seem to recall that in the early USSR, they’d use blood from up to 4 day old cadavers for transfusions.
It is doubtful that any of the landslide victims were involved with the organ harvesting processes. Those of us who care about the Teachings of Christ are saddened by the loss of life from an avalanche. It is not the time to be hateful about the atheist government of China.
Hope they were dog eaters.