For the fourth year, CGTN visited Santai County in SW China to track its journey of getting rid of poverty. The region is famous for its lilyturf roots, and now locals are growing pig farming into another pillar industry. They created a circular system to use pig waste as fertilizer for plants, such as lilyturf roots and tangerines. And these local plants solve the hard environmental problems caused by raising pigs. Follow CGTN's Xu Xinchen to have a look at how this system works.