Back in the 1800s new steam engines, petrol engines etc were shown off which were technical marvels and really did improve productivity and quality of life.
However the China expo is completely and utterly pointless, namely as most of the technology in China isn't Chinese at all it is Russian/American/European/Japanese copied or built under licence. Currently china is STILL a low wage country.
For example:
The man in space, used a Russian rocket
Those Han class submarines are made in Komosolonsk Russia.
The new high speed harmony railway uses French, korea and Japanese technology,
The super high speed maglev is made by Germans.
Thus this is why it is so subdued and pointless, as there is nothing really note worth and wow factor of anything. They haven't made anything which they can truely claim to be their own.
Those were my exact thoughts on that one. Any country with money can buy all those things. Which of course they have done.
Claiming credit for the above things is not hard. Think about it. If they put all of the achievements in the expo, people that come see it will automatically assume that it's china's accomplishment.
Actually, there was one that they said was their "accomplishment". Do you remember the train that is supposed to be the highest elevation train in the world? The one that goes to tibet? The Chinese Gov claimed credit for it as "a great achievement for China" and etc...
But China wasn't the one to build the tracks that had to be bolted down into ice, nor did they build the locomotive that would pull all of the cars that high. The locomotive was imported from the states.