Scaling New Heights in the Second Half of Life

The male protagonist was a diligent veteran technician who single-handedly shouldered the entire operation of the machinery plant. After his retirement, the plant collapsed, yet its members ironically ridiculed and alienated the very person who could have saved them. By serendipity, he gained the appreciation of the group's chairman and continued to shine in the corporation, ultimately becoming a legendary figure in the technical field through his unwavering dedication and expertise.