Sand issues is just one of many construction/maintenance inadequacies you'll find in this country. Around Beijing, most buildings barely get to 5 years old without crumbling walls, broken steps, falling panels, leaks, and other problems.
The school I work at was built in 2008 has good architecture, looks sharp and makes a good first impression on you but parts of it are already falling apart with broken and loose floor tiles inside and outside the buildings, deep cracks in the classrooms chipped brick cobbling in the walkways, rusted railings, and falling side tiles on raised surfaces exposing shoddy brickwork underneath amongst other things. The buildings main facade highlights the use or red brick yet it is no more than a half-centimeter thick covering that is peeling off in many places showing it's nasty and inadequate mortar underneath. The school is not even lacking in money as tuition rates are amongst the highest in the country and the student body come from mostly wealthy families.
It's just one glaring example I know well but everywhere I go in this city, I see shoddy work with the exceptions being the trophy towers you see in city photos.