Reborn to prepare for the college entrance exam, you're letting me retire and make a comeback?

Reborn at 18, before the college entrance exam, I was mistakenly identified as an 80-year-old by the system and bound to the "Retirement and Reversal System." What should I do? I need help urgently! Before binding with the system, Lu Qian was a badminton master at his school. After binding, he's an old cadre getting crushed by old men while strolling in the park. Beside him are his beautiful childhood sweetheart who never leaves him, the aloof and glamorous captain of the women's basketball team, and the stunningly beautiful campus belle from Fujian Normal University… And then… they all say they'll take care of me in my old age? System: [Lu Qian, Retirement and Reversal System loaded… If you could restart your life… would you, in your twilight years, have the confidence to defy fate… and reclaim your lost health and glory?!] Lu Qian: "???" "Retirement and Reversal, but I'm only 18?!"............(A talented author, please collect, follow, and vote!)