Notable tombs in the church included that of Benedict Spinola, the Elizabethan banker.
He said the site, dating from the first to third century A.D., includes about 30 mausoleums and 60 individuals tombs in mostly "excellent" condition.
His tomb includes a bust in black and white marble.
Finally, tombs included ornaments such as jade, which the Shang may have believed to protect against decay or confer immortality.
The tombs built by the community for their own use include small rock-cut chapels and substructures adorned with small pyramids.
The tombs of the supervisors include inscriptions relating to the organisation and control of the workforce.
The royal tomb included generations of burials from about 300 AD, or 1700 years ago.
His tomb includes a carving of the salt officer sitting and working at his desk.
The tombs in the churchyard include one of a Sidney Griffith (died 1618) and more than 20 others from the 17th and 18th centuries.
Some tombs include horse burials and one tomb had especially lavish furnishings.