The most typical one is the fetal dream, which may not be dreamed by the pregnant woman herself, but by a relative of the pregnant woman.
Another is when a family member passes away, someone indeed may dream about them on the night they are still unaware of it.
Sunken ships, seabed, gold and silver, your father taking you on a treasure hunt and it ending abruptly...
Careers, risks, farewells... All these elements are present.
In ancient times, when communication and roads were poorly developed, if a child in a distant place suddenly had such a dream and sought interpretation, they would either rush home immediately or start preparing to mourn at a distance.
Many stories recorded by scholars have similar plots; they took it very seriously because it related to their official careers and familial bereavements.