Most men failed the civil service test given by the han dynasty. if a young mad could not pass what could he do

He could do other jobs that were available to him like doing light jobs or muscle work jobs. Like farming, serving, and other similar jobs.

China’s civil service exam started in the Han Dynasty  but during the mid-Tang Dynasty there were now changes in the system.  It now focused on the classics and literary style instead of technical expertise.  The examination’s goal was to mold the country’s political, intellectual and cultural life.  It also signified a change from a military aristocracy to a new class of scholars and bureaucrats. Though the system was able to promote cultural unity, some say the system limited creativity and produced officials who would question authority. 

If a man fails his civil service exam during the Han dynasty he could possibly do three things in return for this failure. These are:

a. Teaching - offer his services by teaching the youth
b. Serving government officials
c. Get his family support

This test was designed to continue the philosophies of Confucianism. 

Ifound this on google “the existence of agglomeration economies is central to the explanation of how cities increase in size and population, which places the phenomenon on a larger scale. the concentration of economic activity in cities is one reason for their development and growth.” i hope this you for what your looking for.