How did the Song Dynasty compare to the Tang Dynasty?

compared to the song and tang dynasties

Tang dynasty: The Tang Dynasty (June 18, 618-June 4, 907) was an imperial dynasty of China preceded by the Sui Dynasty and followed by the Five Dynasties and Ten Kingdoms Period.

and the song dynasty: The Song Dynasty was a ruling dynasty in China between 960-1279 CE; it succeeded the Five Dynasties and Ten Kingdoms Period, and was followed by the Yuan Dynasty. It was the first government in world history to issue banknotes or paper money and the first Chinese polity to establish a permanent standing navy.