Article in English: It's important to treat others how you want to be treated. If it hurts you when your sister is mean to you, why would you want to cause her that same pain by being mean to her? Being a kind little sister or brother is the first step in getting your older sister to be nice to you. Avoid interacting with her when you're feeling angry. If you're in a bad mood, you're bound to take it out on her. Being mean to her will only make her be mean to you. Although you are younger, that doesn't mean you have to be immature. Even if your sister is being mean to you, that doesn't make it right for you to be mean back. Instead of fighting back when your sister starts an argument, it's best for you to just walk away. Pick your battles. If your sister tries to start a fight, think about the importance of this fight before you engage. Do you really care about winning this argument? Does the outcome matter to you? Don't waste your time and effort arguing over something stupid. Doing things like helping your sister with her chores or offering to help her practice her sport or hobby are great ways to show your sister that you're making an effort to improve your relationship. Hopefully your sister will realize that you are trying to be kind and will, in turn, try to be kind to you.  Don't do all of your sisters chores and don't let her take advantage of you. It's best to help with tasks that can benefit from two people. For example, washing and drying dishes. If your sister is in a school play, offer to run lines with her. Or if she plays soccer, offer to practice with her. Since you and your sister are completely different people, you're most likely good at different things. Maybe you're skilled at basketball and your sister is an aspiring actress. Maybe you get great grades and your sister is captain of her volleyball team. Whatever your differences are, embrace them instead of comparing them.  For example, don't rub it in your sister's face whenever you get a good grade. Your sister may be self conscious about getting lower...

Summary in Indonesian:
Perlakukan dia dengan baik. Jadilah adik yang lebih dewasa. Lakukan hal-hal menyenangkan untuknya. Hindari persaingan antara saudara.