The Solution: use a Bind Mount. This makes the system treat the shared folder as if it physically exists in the user's directory.
# 1. Create a real, empty folder.
mkdir -p "/home/parsa/example"
# 2. Mount the Folder
# Usage: mount --bind [SOURCE] [DESTINATION]
mount --bind "/home/amin/example" "/home/parsa/example"
# 3. Check Permissions
# Ensure the FTP user (parsa) has permission to read the files.
chmod -R 755 "/home/amin/example"