When I was studying German, I used contemporary college German, and the dialogue in it collected several common German accents.
Among them, Guten Abend is more common, and the standard pronunciation is: Abente, Guten.
But you should also know that Germans speak very fast, and a long list of sentences is only 1 2 seconds in our eyes and German mouth. So it is inevitable to hear "Gu Teng Nabente".
Just like in Chinese, we say the word "play". In daily spoken English,
No one will bother to read whether it is "play, son"
The same is true of German. "R" can be a big tongue sound or a uvular, so don't worry too much.
However, the landlord should pay attention to the fact that there is a "Nande accent" in the German dialect accent, which is spoken by many people. The Nande accent sounds mellow and "standard", so many German radio stations now use it to broadcast. Its characteristic is that the letter "T" located in the middle of a word followed by a vowel will be swallowed.
To describe it briefly, when Gu Teng made the "rattan" sound, he blocked the airflow with the root of his tongue and made the "root" sound, but it only blocked it without breaking the sound, and he felt like swallowing the airflow. The difference from the Chinese "root" sound is that the root of Chinese is the outward airflow, while German is swallowing. So in the Nande accent, this sentence becomes "Gugen Abente".
Nachten, that is, "it was with Genen (when Genen resisted, the root of the tongue immediately left the upper pharynx)".
Pure hand tour, hope to adopt.