```
That very night, Professor Tu photocopied Zhang Menglong's exam paper and rushed back to Yanjing.
In the mathematical community of Huaxia, there were a great many schools of thought, each often devoted to a single mathematical problem, and there were already more than a thousand researchers studying the Riemann Hypothesis alone.
Since its proposition in 1859, the Riemann Hypothesis had already been around for more than a century and had become one of the seven great unsolved problems offered a prize by the Clay Mathematics Institute. To date, more than a thousand mathematical propositions have been premised on the assumption of Riemann's conjecture, which underscores its significance in the mathematical community.
That night, the most representative dozen or so mathematicians of Huaxia gathered in an academic research analysis room at Yanjing University.
