If you have the environment and have time to study every day, you will be able to listen and speak soon, about half a year! I've been studying intermittently for n years, but I still don't understand when I meet Vietnamese! ! It can be said that you can read words. I also practice listening in peacetime. The essence of Vietnamese is actually like our Chinese phonetic alphabet with tones, except that they have no Chinese characters. The pronunciation of modern Vietnamese is based on Hanoi dialect (northern dialect). However, many overseas Vietnamese speak Vietnamese with Saigon dialect. Most overseas Vietnamese media broadcast in Saigon dialect. The main differences between Hanoi dialect and Saigon dialect are tone and tongue rolling.

For China people, when they first come into contact with and learn Vietnamese, there are still many difficulties caused by these phonemes. Some people don't know how to adapt at the moment, some people can't master the methods well, and some sounds are inaccurate or bad, which finally affects their interest in learning Vietnamese and their confidence in speaking. If you want to learn Vietnamese well, I recommend Peiwen pedagogy, because self-study is really difficult.

Hope to adopt.