I'm Going All Out to Reach the Top Again

Ling Chen, the Celestial Venerable of Tianchen, was nearing the end of his life, with all his cultivation lost. On his deathbed, he asked his junior sister to cultivate with him, hoping only to fulfill a long-held wish before he died. Who would have thought that after one night, the System would activate and his lifespan would skyrocket? So dual cultivation can extend your life and make you stronger? If I want to return to the peak, I’ll have to give it everything I’ve got!