Shang dynasty maintained control over a large area as:
They had a strong military to protect the people from invaders.
They had good farming methods that created a food surplus to feed the people.
They formed a strong central government to manage the large kingdom.
They were cruel in order to control the people.
Explanation:
The forces of the Shang dynasty maintained an empire that was unprecedented in its time unifying the whole wide population of China under a single belt.
This was achieved y their strict centralization and their use of the army to quell the people into submission.
It was also some economic factors that were able to contribute like the fact that they had good farming methods that created a food surplus to feed the people.
It was also their ability to quell the invaders that kept them in power.
