Why does Chinese English pronunciation just not sound authentic?

As an English major student, I have been troubled by this problem for many years, and of course I have found some reasons for it. The first reason is that Europeans and Americans, especially Americans, speak English with some intonation, that is, they say a sentence with a lot of emotional ups and downs, and they like to use intonation to express their moods, but we speak Mandarin with very little intonation, so it is easy for us to pronounce it in a bad way. But when we speak Mandarin, we seldom speak with intonation, so it's easy for us to pronounce words in a bad way.

The second reason is that the way we pronounce Chinese is not quite the same as the way we pronounce English, and we Chinese like to speak the word correctly, and then the Europeans and Americans speak with a kind of gulp feeling, that is, they are not very clear, and it is very easy for them to pass by, but we can't accurately grasp that, and they will omit which word, so we have to be careful. The first thing I'd like to say is that I'm not sure how much I'm going to be able to get out of this, but I'm sure I'm going to be able to get out of it.

In fact, I think our country's people, English pronunciation is relatively speaking already very good, if you really want to have a mouth especially fluent, especially authentic English, or suggest that you go to the local, really feel how they really pronounce it, and then slowly practiced, the pronunciation can have a big improvement.