Are Humans Weak? Then How Did I Kill All the Alien Races?

Three hundred years ago, spiritual energy revived and demons and monsters wreaked havoc in the world. The human race finally settled in a corner and continued to fight tenaciously against the four major alien races. Two years ago, Qin Tian came through parallel time and space. A magical record of heaven and earth, absorbing the life essence of all things, replenishing the spiritual energy of one's body, making breakthroughs one after another without any obstacles. A divine spear that breaks the world. It is unparalleled in its domineering power and suppresses the entire world. ... "Xiao Qin, if we succeed in cultivating in the academy and reach the seventh, eighth, or even ninth level, what are your plans?" "Of course, kill the aliens!" "Then what if our strength is only level three and level four?" "That is to join the army, kill first and then talk about it. When you are strong, you can kill the aliens!" ... Everyone says that my human race is weak, so how can I defeat the alien race? Thousands of miles away, a man came with a gun and killed the four strongest aliens. After three hundred years, the human race finally saw the light of day again!