Rebecca Davis editorChina had a relatively quiet box office weekend, in which holdover Korean War-set title “Sacrifice” led for the third week in a row thanks to $14.4 million in sales, according to data from industry tracker Maoyan.This week’s most notable new release was the blood-stained, tear-soaked, seaside-set local crime thriller “Back to the Wharf,” which came in second with a $7.09 million debut. It stars Zhang Yu (“Dying to Survive,” “A Cool Fish”) and was directed by Li Xiaofeng.