For example, professional calculus, linear algebra, introductory textbooks, or books like C++ Primer, JavaScript: The Definitive Guide, and Advanced JavaScript Programming that could make one's head feel bald.
There might even be knowledge like The Classic of Tea or The Encyclopedia of Tea, which would be useless even if you returned to modern times.
The second option, tools, is similarly affected by luck.
But from Chen Zhou's perspective, the probability of getting useless junk among tools is obviously lower than receiving "useless knowledge."
Items like axes, saws, hammers, chisels, or professional carpenter or masonry tools make up a significant portion of all the tools.
Even if worse comes to worst, there are farming tools and fishing tools as a backup.
Even if there's not even a duplicate fishing tool, they can randomly give a few iron or plastic items that can be cut and used.
