This book mainly includes monitoring, but not only satellite monitoring, but also sound wave monitoring. Anyway, whatever people can hear and see can be monitored by means of hacking. This is what Tang Ningshan did not expect. Tang Ningshan even suspects that after she has learned all the contents of this book, then whether she would not need to learn anything else.
Unfortunately, just when this idea flashes in her mind, the system says "Master, I suggest you to not be complacent too early. The development of the earth is not so fast. Even if you master the sound wave monitoring, I think you can't use it on the earth for the time being. However, even in such a situation, you must learn this technique. Now, the learning task begins. Learning content, intermediate hacking techniques. The requirement, to achieve proficient level. If the task fails, the punishment will be doubled."
