The Rise of National Martial Arts with Urban Superpowers

One year after the anti-war, oceanic sea beasts poured into the land and slaughtered humans crazily. Some countries on the seaside or in the ocean fell instantly, especially Australia and other coastal areas. The only remaining countries of mankind were a few large land countries far away from the ocean. They quickly established defense lines and finally blocked the invasion of sea beasts... But the good times don't last long. Sea monsters seem to be able to grow rapidly, and their intelligence is completely comparable to that of humans. Moreover, these monster beasts will evolve, and some will turn into human forms, making the human government exhausted to resist the invasion of sea monsters... Just when mankind was about to win, when the sea beasts were about to be transformed into the sea, suddenly, the spiritual energy revived, and all kinds of human thermal weapons turned into scrap metal in an instant and could no longer be used... Missiles and gunpowder can no longer be used. Even pistols can no longer fire, let alone more high-tech things... Due to the weapons, the sea beasts counterattacked crazily, and in an instant they invaded the middle schools of all continents... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.