I think people doing this because they are learning vietnamese and local dialects in china at the same time. that's it. Through this course, we are also learning Hanzi in a different way. Nobody say"接续" in Chinese. So sometimes we think this is really interesting and enjoy the course.
Verbs level 1: to hydrolyze, to declassify (a)
Verbs level 2: to exist, to condole (b)
Verbs level 3: to meet, to continue (b)
(a - slightly exaggerated, b - real thing)
Why is, as the course advances, the words are getting simplier. Was the course designed by Benjamin Button?!