Dark Classic of Mountains and Seas

On the day Zhang Zhongyu turned eighteen, the memory of another person appeared in his mind from time to time. Zhang Zhongyu always thought this was his hallucination. Until after a trip, the world changed drastically. An ordinary wooden arrow that penetrated the satellite, The ancient beast that caused the heavy fog, The immortal who rides the wind and leaves the world alone, An unknown existence where rivers and seas are exhausted wherever they go. The human race is struggling to survive in the cracks of darkness, constantly wandering on the edge of life and death. Demons, gods and Buddhas, weirdness, darkness, aliens The only way to gain power from them is to understand them. When no one knew anything, Zhang Zhongyu was surprised to find that these seemed to have appeared in his memory. All living beings are ignorant, but I know your details.