HSK C7-9
Correct

筝

/ zhēng / 
Strokes

Definition

guzheng or long zither/long zither with 13 to 16 strings, developed from guqin 古琴 during Tang and Song times/Japanese koto

Example

As a Noun

zheng , a 21- or 25-stringed plucked instrument similar to a zither in some ways