A brief description of the manhua Full-Time Awakening:
As the captain of the Divine Legion and the strongest Awakener, Bai Yi is betrayed by a comrade, witnessing all his teammates die before his eyes. Only then does he realize he has always been a pawn of those in power. Having lost everything, he is reborn 20 years ago, back to his middle school days before awakening. https://www.yesmanga.cc/manga/full-time-awakening/