In 2874, a mysterious force suddenly appeared. It was similar to professions and skills in the game, ushering in a new era. It is called Tongmen, and a new profession appears, Tongmen master. After 86 years, mankind has initially mastered the power of the portal, and at this time, a group of people appeared, guests from another world, carrying the truth of mysterious power.
Concept: The first book for middle school teenagers