"Testing me? Why?" Tang Su frowned, unable to make sense of the logic behind it.
"Because... I possess the rare universal blood," Lu Han said.
"Universal blood? You mean panda blood, right?" Tang Su didn't understand medical terms very well but knew that panda blood referred to O-type blood. She was aware of the four blood types and given the large population base, she reasoned that even if it was rare, there must be many people who had it.
"No," Lu Han shook his head.
Tang Su: "???"
Isn't panda blood supposed to be universal blood?
She had heard that people with O-type blood could donate to the other three blood types. Such versatility, wasn't that the definition of universal blood?
"You must have heard of Rh-negative blood. The number of people with this blood type is very small. My blood is even rarer than that, but unlike theirs, mine can regenerate on its own."