As a virtual world tester, He Xilin was testing a world built by the "Thick Thigh" system, but he was so tricked by this virtual world that he didn't even recognize it.
Good "big guys" are discounted for no reason, and the whole world is against him. He can only save himself in a virtual world where the logical direction depends entirely on guessing and the storyline relies entirely on acting with a system that has lost contact with the mastermind.