Question

That was one achievement of the Tang Dynasty

Answer 1

It became the largest nation in the world 

Answer 2

1) The economy grew due to manufacturing, technology, and inventions.

2) Agriculture expanded due to new planting methods and inventions.

3) Trade by sea and the Silk Road.

4) Buddhist temples/monasteries became places to worship and learn. They  would help the community with needs.

5) A large number of foreigners were allowed to live in China,  and everyone who was anyone were allowed to purchase land.

6) The arts flourished during this time, such as calligraphy.

7) Medical schools were opened.

8) There was a whole new social class of educated people.