Many inheritance matters involving China property do not fail because there is no family relationship. They slow down because identity records do not line up, the property path is unclear, or overseas documents are not yet in a form that can be used in China.
Start with identity
Nationality, regional identity, prior names, and historical records all matter.
Map the assets
Property, bank assets, and equity interests may each follow a different practical path.
Check document form
The issue is often not whether a document exists, but whether it is usable where needed.