C638 Let officer wang be engaged to fan peizhen

A blood change could cause the heart to stop beating.

However, currently there was no such thing as an official doctor daring to exchange blood, so Zhang Ruoxuan could only rely on his own guesses.

"No, when the time comes, just cut my wrist and let me bleed. Just leave the rest to me, this old woman." The old lady could see that Zhang Ruoxuan was meticulous in his thoughts.

"Child