Living in Primitive Times

Unknown birds and beasts were flying in the blue sky. The breeze blew the surrounding leaves and shook them slightly. The rustling wind was mixed with bursts of exclamations. Yang Haoyu sat up with difficulty and looked in the direction of the sound. He suddenly blurted out "fuck". Wherever he could see, he saw more than a dozen humanoid creatures with old animal skins wrapped around their waists staring at him. Who am I? Where am I? What am I going to do? Yang Haoyu immediately issued a philosophical triple link...