i was watching mystery of twin swords 1 & 2.

the actress who played thanh thanh/ching ching... how come in part two when they wanted to take out the evil/bird genes of tieu diep it didn't work, but when it went through thanh thanh, then through tieu diep... it worked or eased the pain for her?

i heard them say something about the time, day, month, year she was born?

also in part one, she was used for the monster guy to use her energy to practice martial arts. this isn't the only movie or character i`ve seen being used. but using her as an example....

there was also another character in the same movie, that was used to practice martial arts, like Ban Cua (*excuse my viet) the lady who was wearing red, and had a scar on her face.... she was one of those people being used too...

someone explain, cuz i dunno im REALLY curious. thanks<33

sorry if its in the wrong section too...