This is hardly surprising because most of them do not maintain or have access to,genealogical records beyond their immediate forebears.

• 其实这也没什么稀奇的，因为他们大多没有留下任何家谱记录，甚至没有家谱可查阅。比直系亲属更上一代的祖先恐怕已经追溯不到了。