Song He: "Go on, go on!"
Xiang Xiaotong: "Recently, an old master of foreign Chinese descent is planning to return to his homeland. He opened an account on a domestic social platform, and you can take your problems online and ask him. He only answers valuable mathematics or physics questions."
Song He frowned. "That won't work, Teacher. The project I'm working on is classified. I can only discuss it with internal personnel."
Xiang Xiaotong: "Talk it over with your supervisor. This person can be trusted as a collaborator. He was born into a Chinese family in Malaysia and received a very traditional education from a young age. He only took foreign citizenship to pursue his studies. He's maintained close ties with us over the years. He introduced more than a hundred outstanding doctoral students to come work here, and when accepting students, he gives priority to those who passed over from our side. In a way, he's been making contributions. Ten years ago, he was already one of our foreign academicians. When we held the International Mathematics Summit, he helped us a great deal through his overseas connections."
Xiang Xiaotong: "He plans to find a teaching position at a domestic university while also obtaining domestic citizenship and a registered residence. Right now, Qing University, Northern University, XiGong University, and Frontier Technology University are all competing for this old master."
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Xiang Xiaotong: "The old master couldn't decide where to go, so he posted a series of problems on his social media, along with hints. Whichever school's students solved the most problems would prove that the school had the best students, and he would go to that school."
Xiang Xiaotong: "The problems you sent happen to fall within one of the old master's research fields. I suggest you take