I Became a Genius When the Whole World's IQ Dropped!

Plot Synopsis

Ye Xing transmigrated to a parallel world and discovered that the intelligence of the whole world had declined. Everyone except himself regarded multiplication and division as world-class difficult problems. So he used the knowledge he had learned to reach the peak step by step. However, he was coveted by foreign forces. After fighting back again and again, he finally became a prince of the Xia Kingdom.