Aren't You Making Tractors? Why are You Changing It to Tanks?

Jiang Yang traveled back to 1957, and at the beginning, he had to discuss with others how to design a tractor without the memory of his original body... After finally getting through the crisis, he just wanted to live a stable life, but he found out that he was a returned student with a questionable identity. There was no other way. In order not to be suspected, Jiang Yang had to keep producing results to prove himself. As a result, he accidentally overexerted himself and was called by his superiors to start building tanks, thus starting the legend of China's military industry!