I summit my first homework! I think Chinese is the most difficult language to learn. There are many reasons but the most powerful one is that they have tones. In my opinion, the fact that the meaning changes depending on the tone makes it difficult. I think there are two typical things. One is that people feel bored when they continue with the same pattern of daily life. The other is that they feel bored and lethargic when they have so much time to spare and there is nothing they want to do.