The moral of the body in the dream:
A corpse is a body left after the death of life. From the image, the corpse symbolizes the repressed part of the heart.
On the one hand, it shows the dreamer's nostalgia for the people and things that passed away in his life, including his deceased relatives and friends, including passers-by in his life, and his youth and appearance that quietly left with age.
On the other hand, it also shows the loneliness and emptiness that dreamers can't get rid of. Those bodies represent the dreamer himself and the sadness and helplessness he feels about the empty shell life.