//++中文版++//
封闭在硬盘里的图书管理系统，其中的管理员将会是程序生成的四维空间机器人，拥有超过人类的智慧，和天使般的心灵。
而这个如同天使的四维管理员所管理的虚拟图书馆，同样能通过引导读者借助四维空间的优势实现高效率的学习，可能图书馆的图书不是很多，但对图书的剖析会达到非常精细的程度，而且四维图书管理员自身也会通过不断学习实现自我进化，并经常升级虚拟图书馆，但有一点初心不会变，那就是天使般的心灵。
这就意味着，走进这个虚拟图书馆的读者，尽管可能只待上了一分钟，但实际收获却可能超过百年，而这便是面向未来的图书管理系统最希望帮读者做到的事。
但是，迄今为止，有人见过四维空间么？就谈猜想四维空间吧，除了数学上在三维坐标系上加一个坐标轴等数学演算方法，貌似也没有更好的猜想方法了。
//++English version++//
The book management system enclosed in the hard drive will feature administrators who are four-dimensional space robots generated by programs, possessing intelligence surpassing that of humans and angelic minds.
The virtual library managed by this angelic four-dimensional administrator can efficiently guide readers through the advantages of four-dimensional space for learning. Although the library may not have a large number of books, the analysis of the books will reach a very detailed level. The four-dimensional library administrator will continuously learn, achieve self-evolution, and regularly upgrade the virtual library. However, one thing remains unchanged—the angelic mindset.
This implies that readers entering this virtual library, even if they only stay for a minute, may gain knowledge equivalent to over a century. This is what the future-oriented library management system aims to achieve for readers.
However, has anyone seen the fourth dimension so far? Let’s discuss speculations about the fourth dimension. Apart from mathematical calculations such as adding an axis on the three-dimensional coordinate system, it seems there is no better way to speculate.