It happened six days ago.
Dan posted a video in which he indicated some Vietnamese teacher still make a mistake in speaking English.
He let his parents who are not used to getting listen to Eng - Viet accent.
A lot of sentences they couldn't understand what the teacher said.
Perhaps when he posted this video up he had no idea that it would become a issue making a lots of opposite opinion.
Some said that he insulted those teacher and other said he just did it to make clear our mistake in English.
Then not stop at that, those teacher mentioned in this video made a response video.
They were sorry about that but they also blame it on their local accent.
This made a another wave in different opinions.