This is a height --- the height in the hacker world, no one can reach it except him! Tormenting the firewall and playing with the server, that is not his style!! Jane, that's his height!!!! ------------------------------------------ -------------- Readers who read this book may have the following three results: 1. Begin to be interested in "Book of Changes", and start researching with great perseverance. 2. Readers who engage in software Start to study the feasibility of the software engineering framework of the Guaci expert system. Third, readers who engage in hardware begin to analyze the applicability of the electronic logic principles of the Guaxiang chip. If the above results appear, then the original intention of Laogan writing this book is truly realized .