Second part of The Hate Trilogy by Sono Shion.

-Chinese language films
-Kidnapping
-Captivity
-Psycho dude

Both films detail a young girl(s) who is kidnapped, held captive, and subjected to torture by a man.

-Kidnapping
-Captivity
-Modern day slavery
-Sexual abuse

-Rural China
-Small village
-Villagers taking advantage of vulnerable woman
-Sexual exploitation

Stolen Identity 2 is the sequel to Stolen Identity

-Parent's unrelenting searching for missing child
-Child abduction

-Parents searching for missing child
-Chinese language film
-Child abduction

Both films show a father searching relentlessly for his missing son.

Both films tackle missing children and the desperate, long struggle their parents go through trying to find them.

It's not the main theme, but in both films there is a warden who hates and is sadistic towards a particular inmate.

-Peking Opera
-Male playing a female role in an opera is admired and celebrated for his beauty and talent