What’s the different between 이/가 and 은/는 I have confusing of using them. Anyone would give me a clear explanation ? Very thankful for your help.

这是什么菜？ 请问， 我想知道这张照片是什么菜？我曾经在昆明里吃过。 非常喜欢。 这张照片不是我拍的 在网络上找到的。

好久不见 。 你好 我是一个法律的学生。 我上高中的时候学过中文。 我觉得中文很好学也非常有趣。 很多人会说中文。 我现在的中文说得还差。 最近都忙着学习法律 很少联系中文。我要进步我的汉语水平。 我很快就毕业了。 毕业以后 要学中文。 我还想去中国。 如果有机会 有时间 我一定去中国。 我去过了北京和昆明。 还有什么地方好去吗？给我建议建议。

Happiness For me, happiness is the way you look the world. If you think positive, the positive feelings will come to you. Everyone can build the happiness. If you wait for others to give you the happiness, you will be dissapointed when they can't give it to you. So believe that you can build the happiness, you will get the true happiness when you have it and express it to people. You will be happier than being a receiver.