People do say "你好" in formal, like "How do you do?" such as greet someone who just met for the first time. "Hello" is more like "嗨", casual greeting. Having sa

People do say "你好" in formal, like "How do you do?" such as greet someone who just met for the first time. "Hello" is more like "嗨", casual greeting. Having said that, learning spoken and writing English are hard for countries that have complete different language system such as Japanese and Chinese, Korean etc. Two reasons: First, there’s no argument that they all have completely different style of writing and pronunciation. Nothing to piggyback on like Dutch or German. The English teacher in my school doesn't even speak good English, more like "Chinglish" as we mostly emphasize in writing. Many do write English well but have hard time communicate verbally. That’s a BIG problem. The second thing is that the in the old days, kids don't get to learn English until in middle school. The best time to learn language is when one is still very young. It then becomes a second nature rather than a skills to master later in life. I think that it's different now. Kids are learning English early in school now. However, they don't get to practice outside of school.