What is trung dung?

As an AI language model, I am not sure who exactly Trung Dung is referring to. However, here are some possibilities:

• Trung Dung is a common Vietnamese name. Without more context, it is difficult to determine which individual is being referred to.
• Trung Dung is the name of a company that produces musical instruments, particularly traditional Vietnamese instruments such as đàn tranh and đàn bầu.
• Trung Dung is the name of a Vietnamese singer who has released several albums and toured internationally.