What does the property fee of 1.86 plus the charging standard in 0.5 yuan mean?

First-class standard. Property cost per square meter 1.5 yuan, which is a first-class standard. The first-class charging standard is 1 yuan ~ 1.5 yuan per square meter; The secondary charging standard is 0.7 yuan ~ 1 yuan per square meter; Three-level charge from 0.5 yuan to 0.7 yuan per square meter; The four-level charging standard is from 0.3 yuan to 0.5 yuan per square meter; Level 5 charges 0.3 yuan per square meter.