Translate sister and brother in Chinese?

Here are the translations for "sister" and "brother" in Chinese:

Sister:

* 姐姐 (jiě jie): Older sister

* 妹妹 (mèi mei): Younger sister

Brother:

* 哥哥 (gē ge): Older brother

* 弟弟 (dì di): Younger brother

Note: The terms "姐姐" (jiě jie) and "哥哥" (gē ge) are used for older siblings, while "妹妹" (mèi mei) and "弟弟" (dì di) are used for younger siblings.