The dam was the biggest construction in China intended to supply electrical energy. However, if something wrong happens to the dam a great disaster is foresighted to happen. Besides that, it can drown several towns historians and archeologists explained that this can erase 1300 important sites. It will also affect the homeland of Ba, ancient people, that lived 4000, years ago.
Direct democracy would be extremely costly because people would have to vote on every single thing and this would cost time and money to ensure everyone has voted. It couldn't be resolved in early times, but maybe with the age of technology, you could surpass that by having everyone vote online or something similar.
Perhaps the greatest transportation development that took place during this time was the creation of the railroad, which many travel and the transfer of goods far easier and therefore far cheaper.
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It established the Judicial Courts, making up our whole judiciary branch.
