This is how I interpret it:
The episode [the conviction of Ms. Gu] shows that the myths [claims made by that particular government]
are not truthful.
a. The false myths are listed after the colon that follows the word "foster."
I respectfully suggest that you check your bilingual dictionary for the verb "belie." I believe that it would be a
very helpful addition to your English vocabulary.
"Tom says that he loves his wife, but his actions belie his words." (His actions -- he has a girlfriend, he doesn't
help his wife with the children, he never remembers his wife's birthday, etc. -- show that his words are a "lie.")
Student or Learner