Reborn as a Tree: Ancestor in Ten Years, Saint in a Hundred

[Not a power fantasy, focused on evolution, no female lead, never becomes human] My name is Changsheng. Given another chance, my life begins as a single seed! At first, all I wanted was to live for a long, long time. But later I realized that was only the bare minimum...! [My branches and leaves stretch across the nine heavens and ten lands, supporting the four seas and eight wastelands. I am the backbone of heaven and earth. My roots spread throughout the three thousand worlds and roam the countless grains of sand along the Ganges. I am the foundation of the primordial universe. Immortals and gods once called me the Heaven-Piercing Jianmu. Other mighty beings named me the World God Tree. Whatever praise or blame comes my way, I accept it all. I watch with cold eyes as, over countless ages, endless heroes are washed away by the tides of time, never to be seen again. What a pity! Only I remain forever at the end of the river of time and space, stirring the waters of the ages. When immortals see me, they call me their ancestor. When sages see me, they address me as their master. If asked where I come from, I smile and say: I am the greatest tree of all time!]