The protagonist genuinely develops as the film progresses and your views on each of the main characters continually shifts. One of the most powerful elements is that you do feel pity for the protagonist even after her petulant and vindictive behavior.
The title of the movie appeared very odd to me. Probably the most apt title of any film as the weary rituals of the ancient household form more and more meaning. The symbolism of raising the red lantern is the soul of the picture. It represents the total power of the polygamist over his harem.
Spoiler: One of the most interesting displays of this dichotomy between the power of the men and women that the man is having an affair. But when discovered nothing happens. He is already legitimately sleeping with 4 women. When wife number three is caught the penalty is death. I also loved the little power the women enjoyed: whomever has the lantern may set the menu. Our protagonist decides that what is happening is beneath humanity and would rather die than be part of it.
The film feels slow burning but the intensity builds and builds as layers are added to the plot and each character. For a fan of foreign cinema: unmissable.