What were the strengths and weaknesses of the Song dynasty?

The strengths are more likely to tend to the economy and culture. The boom economy made the Song Dynasty the most prosperous dynasty in China's history. In culture aspect, there were a lot of poets and litterateurs. As for the weakness, as the emperors in the Song Dynasty restricted the military force so that it used to be invaded often and people suffered from wars from time to time.

you are correct alice, impressive, very impressive