With the increase in consumer goods consumption and population growth, the global packaging market has steadily increased from US$7414 in 2012 to US$869.3 billion in 2016, 

with an average annual compound growth rate of 4.1%. Due to the diversification of consumer products and increasing packaging requirements, 

the global packaging market is expected to continue to grow at a compound annual growth rate of 3.4% in the next five years.

And now most countires already forbidden plastic bags, so more and more people choose paper bags. 

First , it is eco-friendly for the nature. Second, it is cheap. Third, there are variety of designs to choose from.