I Have a Secret Guide

Above the nine directions, a secret realm descends. The bustling city has ushered in the fourth human revolution. Secret realm stone tablets appear one after another, in the inaccessible wilderness, the untouched deep sea, the sea of clouds high in the sky, the secret realm of ancient martial arts, the secret realm of Xuan Dao, the secret realm of myths, the secret realm of ghosts, the secret realm of science and technology, the secret realm of alchemy, the secret realm of weapon, the secret realm of literature... Every time a secret realm contains danger, it also attracts countless people to visit it. Civilization has been impacted, and humans have touched a new corner of the world...