The Intelligence of All Mankind Has Deteriorated, but I Have Survived!

Quan Renyi, who has just graduated with a doctorate, traveled to the parallel world of Dragon Kingdom. Not only the customs and habits here, but also all the details are exactly the same as in the previous world. But the only difference is that the people here have very low intelligence. A high school student who can calculate the sum of three digits is considered a genius. The top think tank in a country is only at the graduate level! ? Here, a bad cold kills people, and culture doesn't even survive... At this moment, Quan Ren, who has dabbled in medicine, physics, biology, chemistry, etc., Suddenly discovered that he had become the smartest person in the world! "Damn it, he can actually calculate the multiplication of three digits verbally!?" "What!? The lungs have been conquered!?" "No way, light is both a wave and a particle!? How can there be two forms of things in this world!?" "Oh my god, how come Quan Ren knows everything and is at the top of the world!?" This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.