Why might northern ltaly have a good place for renaissance to began

One major reason the Renaissance began in Italy is linked to geography. The city-states of Italy, positioned on the Mediterranean Sea, were centers for trade and commerce, the first port of call for both goods and new ideas.

china has confucianism thats everywhere in asia but it isn't really a religion.  

martin luther believed that selling indulgences was wrong and gave people a license to sin. the roman catholic church used the practice of indulgences to raise money for major building projects.