Identity of the protagonist: Lin Yue, a top student in the Department of Modern Mechanical Engineering, is proficient in mechanical design, basic circuits and materials science. He has a pragmatic personality and strong hands-on ability. He is a little social-phobic but has a bottom line.
2. Time-travel background: During the experimental accident, he was involved in a space-time rift by a high-voltage arc, and traveled to an imaginary era similar to the "Yong Dynasty" in ancient China (the productivity is equivalent to the mid-Northern Song Dynasty, but there are frequent border wars and fierce party disputes in the court).
3. Cheap finger settings: Bind the "minimalist technology library" with you (only basic theories and design drawings, no ready-made items, you need to collect materials to make them by yourself), and the body's five senses will be slightly strengthened due to time and space travel.
4. Core conflict: the collision between modern technology and ancient productivity, the conflict between personal ideals and dynastic rules, and the dual pressures of foreign enemies on the frontier and internal strife in the court.
