Why can't all the concubines in the court play get along?

The most straightforward reason is to survive.

There is only one emperor, and concubines can't be exposed to rain and dew, so concubines can only play tricks to win the emperor's green eyes in order to survive better.

If you don't harm others in the harem, others will harm you. Only when you are favored by the emperor and have a high status can others have no chance to hurt themselves. We can see from the TV series that as long as the concubines are favored by the emperor and have power, they can be arrogant, and even their high-ranking concubines are ignored.

In order to achieve this goal, concubines do everything they can. How can they live in harmony and give this opportunity to others?