"Yanhua University? China?" Wiles was very surprised. "This place..."
Wiles hesitated.
...
Zhao Yi had the sudden whimsical idea of inviting Wiles because he recognized Wiles's level—could there be difficulty in producing a mathematical proof that the Newton Institute was incapable of disputing and that no mathematician around the world could find fault with?
Inconceivable.
Wiles's understanding of elliptic curves and hyperbolic functions was, unquestionably, among the very best in the world, and he had spent his life researching the Taniyama–Shimura conjecture. It was precisely through the proof of the Taniyama–Shimura–Weil conjecture for semi-stable elliptic curves that he proved Fermat's Last Theorem.
Although it was later shown that his proof process contained errors, no one could deny Wiles's level.
But Zhao Yi's invitation to Wiles was not because of his mathematical theoretical research abilities but because of his work experience.