What instrument is this?

[ad_1]

I just found this beautiful song, and I was wondering what is the main instrument playing, some type of string instrument?

Song: [https://www.youtube.com/watch?v=EuSmZzLG1xI&feature=youtu.be&ab_channel=hiyoung0505](https://www.youtube.com/watch?v=EuSmZzLG1xI&feature=youtu.be&ab_channel=hiyoung0505)