Three workers dangle high above the ground to clean the glass of a downtown Wuxi high-rise. [Photo / wxrb.com]

Window cleaners, or 'spider men' as they are often called in Chinese, can be seen working through the summer heat to clean downtown windows.

While many may find the prospect of hanging up to 20-storeys above the ground scary, these brave window cleaners meticulously scrub the outside of the building to make sure it sparkles in the summer sunshine.