What do you mean, there's half of her face hidden behind her guitar?

Holding the pipa half-hidden is holding the pipa half-hidden in your arms. This sentence comes from the poem Pipa Xing written by Bai Juyi in the 11th year (8 16).

Still hiding half of her face behind her guitar is a famous sentence in Bai Juyi's poem Pipa, which was originally written about the shyness of pipa girls when they came out.

Later, it is often used to describe a woman's shyness, which is extended to ambiguity, cover-up and fear of exposure.

Still hiding half her face behind her guitar from us "is often used to describe a girl's shyness." It can also mean that a thing can't see clearly and doesn't know the direction.