How do CCP leaders maintain longevity, and why do many die from COVID?

The average life expectancy of Chinese leaders is higher than that of the leaders in Western developed countries. China spent enormous amounts of money taking care of CCP officials, current or retired. Recently, many retired CCP leaders have died. Even though the official obituaries attributed the cause of death to lung infection and others, COVID was the likely cause. One of the CCP leaders’ secrets to longevity may have contributed to their high fatality during China's COVID surge. The atrocity behind the longevity must be exposed.