Experts so far have only been able to identify the tomb's owner as an aristocratic woman of the Northern Wei Dynasty.
Archaeologists opened the pinewood coffin on Saturday and found the remains of a person wrapped in silk clothing, state news agency Xinhua reported.
She had thick black hair with a metal headband and wore fur boots, the report said.
It is not yet known which ethnic group the woman was from.
Archaeologists found a bow, a dagger, pottery jars and bowls in the tomb.
Archaeologists have collected the woman's hair for technical analysis, which is expected to lead to information such as her age and diet habits.
Two other tombs of the same period have been discovered in the past two years in adjacent areas, which have shown the locality is an important burial site for aristocrats of the Northern Wei period, the report said.