How much is it per square meter to clean the external wall and glass curtain wall?

Quotation for cleaning exterior wall glass curtain wall:

Cleaning price of new glass exterior wall per square meter 1. 1 yuan;

The cleaning price per square meter of the old glass exterior wall is in 2.5 yuan, and the cleaning price per square meter of the old glass exterior wall higher than 8 floors is in 2.3 yuan!

The above prices come from the internet and are for reference only. The specific price is subject to purchase.