He is not genius...
He is Prodigy

prod·i·gy
ˈprädəjē/Submit
noun
noun: prodigy; plural noun: prodigies
a person, especially a young one, endowed with exceptional qualities or abilities.
"a Russian pianist who was a child prodigy in his day"
synonyms: genius, mastermind, virtuoso, wunderkind, wonder child, boy wonder, girl wonder; More
an impressive or outstanding example of a particular quality.
"Germany seemed a prodigy of industrial discipline"
synonyms: model, classic example, paragon, paradigm, epitome, exemplar, archetype
"Germany seemed a prodigy of industrial discipline"
an amazing or unusual thing, especially one out of the ordinary course of nature.
"omens and prodigies abound in Livy's work"