Did You Know on Instagram: "Shanghai introduced a rule that most people outside the region have never heard of. Every construction truck must be fully washed and inspected before it’s allowed to touch a public road. No mud on the wheels, no dust on the sides, no loose debris that can scatter across streets. Construction vehicles are one of the biggest contributors to urban grime. Dirt falls from truck beds. Mud gets dragged across intersections. Dust pollutes the air. Multiply that by hundreds o