I Just Want Everyone to Protect the Earth

In 2221, the earth is about to be destroyed! In order to save the world, mankind opened the time tunnel and launched the "Salvation System" to return to 2021. Zhang Xingxing, who obtained the system, shoulders the great mission of protecting the earth and saving the world. Zhang Xingxing, who possesses future science and technology, unknowingly became a world-class boss while protecting the earth, predicting disasters, and preventing biological and chemical warfare... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.