1. Prepare relevant materials in advance: You need to prepare relevant supporting documents, such as death certificate or cemetery purchase contract.
2. Contact the cemetery manager: You can contact the cemetery manager first and explain your purpose and the information of the deceased friend you need to find.
3. Access to relevant records: The manager may instruct you to access relevant records, such as purchase records or burial records of cemeteries.
4. Conduct a field search: If you have determined the general location, you can conduct a field search to find the tombstone of your deceased friend.
5. Ask for help: If you can't find the location of your deceased friend, you can ask the manager or other visitors for help.
Please note that different cemeteries may have different regulations and procedures, so it is best to consult the cemetery management before going to the cemetery.