Although, I just tried with normal Qwen 2.5 72B and Coder 32B and they only did a little better.
Spoilers ahead!
First novel: The Trisolarans did not contact earth first. It was the other way round.
Second novel: Calling the conflict between humans and Trisolarans a "complex strategic game" is a bit of a stretch. Also, the "water drops" do not disrupt ecosystems. I am not sure whether "face-bearers" is an accurate translation. I've only read the English version.
Third novel: Luo Yi does not hold the key to the survival of the Trisolarans and there were no "micro-black holes" racing towards earth. Trisolarans were also not shown colonizing other worlds.
I am also not sure whether Luo Ji faced his "personal struggle and psychological turmoil" in this novel or in an earlier novel. He certainly was most certain of his role at the end. Even the Trisolarians judged him at over 92 % deterrent rate.
Though I would say humans would have difficulty too -- say, having read The Three Body problem before, then reading a slightly modified version (without being aware of the modifications), and having to recall specific details.
That said, once you have defined what is required, I believe you will have solved the problem.
He's like God's perfect sociopath. He wobbles between total indifference to his mission and interplanetary murder-suicide, and the only things that seem to really get to him are a stomachache and being ghosted by his wife.