I don't understand why people are willing to even accept the premise. The system as described (a book of instructions for manipulating Chinese symbols) can't usefully answer the question "what time is it?"; why should I believe it could carry on a lucid-but-very-slow conversation in Chinese? Imagine that also in the room is a triangle with four sides. Now the Chinese Room Argument disproves AI and geometry! What subj…
People get handwavey in these thought experiments, that we can just assume that such a system can be built. Well, no, we can't, not even in theory. It's trivial to show that a Chinese Room that could converse for more than 15 minutes would have to contain more elementary particles than the entire planet.
There is an analogy here with Chomsky's linguistics. You can disagree with the specifics of his theory, but he did show that there was no way that people were learning sentences like parrots and repeating them. There had to be some computational / grammatical process.
Anybody can imagine mechanical alternatives for doing any information processing. To an extent, that drives the whole of the programming industry. The whole question of intelligence is that we can do it with a few pounds of biological material. Anything that doesn't address this is missing the point.