After more than ten or even dozens of years of persistent contemplation on a single mathematical problem, all the tools that could be used have basically been attempted.
Zhang Shuwen expressed understanding, but of course, he wouldn't take on everything. No choice, as Qiao Yu was not his student. It's hard to even say their relationship was good.
After all, when they first met, he had sternly scolded Qiao Yu, even criticizing him for being too ambitious.
Although he had the best intentions at the time, the gap between today's young people and their generation is profound, and Zhang Shuwen wasn't sure what Qiao Yu thought.
Perhaps he always considered him an old relic who liked to lecture others—this was very possible. Especially since this guy had grown into a genius he couldn't easily evaluate...
