It is the principal harp of this orchestra. Each major has a concertmaster. The principal must play the first part of the score in the music. The principal violinist is the principal of the first violin part and also the concertmaster of the orchestra. . For example, if there are multiple parts within the flute major in a symphony, the principal flute will play the first flute part, the second flute will play the second flute part, and the third flute will play the piccolo part. Generally, the total number of orchestra members is greater than the number of performers, and the harp usually only requires one person when playing a symphony. Then when the principal harpist of this orchestra is the leader of the harp preparation team of this orchestra (you understand when I say lesson preparation team leader) plays the harp part, you are there.
If the second harpist plays the harp part, it means that the chief harpist is on vacation