The un-rotten body of a Buddhism believer

In December 24th, 1992, Zheng Fengchen died naturally in Xianghe Country, Hebei Province, China. However, her temperature didn’t come down after her heart stopped beating for 24 hours. Even a week later, her body remained as soft as alive, and the veins in her temple still clear to see, being full of elasticity. Stranger thing is that there is blood flowing through the back of her hands. After 3 years under natural conditions, the body of old Lady Zhou Fengchen had been evolved info "Diamond Glazed Body".
According to her families, Lady Zhou was a pious Buddhism believer. She leaded her life in the light of Buddhism doctrine, especially in her diet habit focusing on vegetarian food. She had cured a number of people for free by her special methods, which reflected the universal salvation thought, one of the Buddhism doctrines. Also, she insisted on burning joss sticks everyday three times, even though she was unable to walk in her later years.
At her 88-year-old, she passed away naturally. But her body became immortal body aroused lots of curiosity by people, for Lady Zhou was an ordinary Buddhism believer. And there are different sayings on that. Most of people believe it caused by Lady Zhou’s pious cultivation according to Buddhism doctrine.