Babylonian research and writing sent a lot of work, and the early technology at least doubled.

Both civilizations can be one step ahead and one step ahead.

The characteristics of Korean civilization are suitable for the outbreak after enlightenment, and each major has +2 scientific research.

Regardless of the characteristics of civilization.

Pave four cities in the early stage, follow the tradition and develop four more powerful cities.

After the library-university, scientific research can be greatly improved, and there must be at least 120 scientific research in about 100 rounds (if it can't be achieved, it means that the bureau has been seriously disturbed, or your farming level needs to be improved)

After that, the policy adopted rational opening+orderly factory +25% scientific research.

After the rationality is full, you can start signing cooperative research agreements.

Miracle as far as possible to win the big library, it is best to get the Great Baoen Temple Tower.

I can't say too much, I can only say one direction, but if I don't even know the basic things, it's useless to say more. I recommend going to CIV's Civilization 5 Forum and reading other people's battle reports.