Skyscraper window glass cleaner（摩天樓窗戶清潔工）

Skyscraper window glass cleaner [nen.com.cn]

You need tremendous courage to be a skyscraper window glass cleaner. If you suffer from acrophobia, forget this job. Glass cleaners are suspended on a narrow sill a few hundred feet above street-level - not a task for the faint of heart.