Mao's body was embalmed shortly after his death using a modified version of the Soviet preservation technique developed for Vladimir Lenin. The process involved removing Mao's internal organs and replacing them with embalming fluids. His body was then sealed in a crystal coffin and placed on display in Beijing's Tiananmen Square.

Temperature and humidity control

To prevent Mao's body from decomposing, the temperature and humidity of the mausoleum are carefully controlled. The temperature is kept between 14 and 16 degrees Celsius, and the humidity is kept between 40 and 60 percent. Air filters are also used to remove dust and pollutants from the air.

Chemical treatments

In addition to temperature and humidity control, Mao's body is also periodically treated with chemicals to prevent it from decaying. These treatments include formaldehyde injections, alcohol baths, and ozone sterilization.

Security

The mausoleum is closely guarded by Chinese security forces. Visitors are not allowed to touch Mao's body, and they are only allowed to view it for a few minutes at a time.

Mao's preserved body has become a symbol of China's communist revolution. It is a reminder of Mao's legacy and his enduring influence on China's history.