Answer:
I think they have had 66 with an average of one every 1.14 years
It led the execution of 35 African Americans and some were hanged making it the biggest execution
The main reason of why the emperor sent out Zheng He was to increase the Chinese trade and the reputation of his nation.
What important information he brought back was the info on the wind directions, oceans currents, plants and animals he saw, different tribes and kingdoms that would be in for future trade projects.
