Are many cobwebs peeling or something else on the outer wall of the community?

Many cobwebs on the outer wall of the community are like cracks in the wall. According to Anjuke's inquiry, these cobwebs are a few centimeters short and about one meter long, and most of them are distributed radially, like small "cobwebs", which are cracks in the wall. The severely cracked place bulges gently, as if the wall skin is in danger of falling off at any time.