Professor Wei Minting answers:
The cell that tumor is local organization is unusually proliferous and those who form is new biology, constant expression is local bump. Tumor cell has unusual configuration, metabolization and function. It grows exuberant, often show durative grow. Sow to other place by former hair place medicinal powder, this kind is sowed be like,come loose uncontrollable, will violate vital part organ and cause exhaustion, cause death finally.