Taking time as the axis, we will witness the changes in Yulin's ecology, making mountains and rivers green, blue skies, and clear rivers and lakes become the norm, and making cities, towns, and villages each have their own beauty and share the same beauty... Strolling along the banks of the Yuxi River, with blue sky above your head, and fertile soil on your feet. Enjoy the clear water nearby, Yulin has become a beautiful home that 3.6 million children on the Loess Plateau are proud of.Green dev