Since Turing had previously raised a similar question and Jask was absent from that meeting.
So...
The only ones who heard the answer at that time were Copernicus, Newton, Galileo, Da Vinci, and Gauss.
Copernicus is already dead, so let's set him aside for now.
Lin Xian was actually willing to engage in [intelligence exchange] with Newton and Gauss, but the problem is...
They might not agree!
Newton and Gauss hold the chips he wants to know, but he himself lacks any information they might be interested in. Trying to extract something from these shrewd mouths without offering anything in return is overthinking it—it's good enough if they don't trick you.
As for Galileo, Lin Xian did know a lot of the intelligence he wanted.
Whether it was space-time particles, comets, Astatine-339, or the neural electrocution helmet, he had plenty that would interest Galileo.
From a purely physical standpoint, exchanging intelligence with Galileo was possible.
But!