Write an essay (150-180 words) about a kind of cultural heritage in Vietnam

Write an essay (150-180 words) about a kind of cultural heritage in Vietnam (such as a tradition, a festival, or a form of music)
 
You can use the following questions as cues.
 
- What is the kind of cultural heritage in Vietnam you would like to mention?
 
- What are the problems this cultural heritage may face?
 
- What are the measures to preserve this cultural heritage?