Release That Plot

In the familiar, yet an unfamiliar world where witches were just a part of supernatural facts that ran along with the world, Chen Yan found himself replacing someone called Roland, a prince regarded hopeless by everyone. But as soon as he realized that fact, Chen Yan wanted to cry but had no tears. He bellowed inwardly, whoever in charge, you got the wrong person! Chen Yan was indeed the name of the person who supposed to enter the stage and play the role of Roland... In the story, he read! Having share just the name, education wise though, he couldn't possibly hope to replicate the mass technological breakthrough the protagonist with a firm engineering background in the original story made one after another. Would he passed troubles after troubles, thrown by the almighty original plot with feeble education and superficial knowledge of the story he only read merely a hundred chapters in?