can anyone please tell me that how to golden guitar lines in photoshop
Wacom tablet and brush. Add (a type of) lens flare.
Actually now that I look closely, those bright spots are very lazy. They are all the same except for the purple one. Make one and duplicate.
First of all, I don’t think someone took a picture of a man playing guitar and converted the guitar to the lines. The illustrator either had a photo of the man holding his hands in the correct position or the illustrator retouched a photo of the man playing guitar to remove the guitar. Either way, the illustrator was starting with a blank canvas, so to speak.
After that, it is a matter of painting in the lines.
The fingers of his left hand being on the headstock is a dead giveaway that the guitar was drawn in a separate process, then spliced in (by someone who knows nothing about playing guitar).
And based on the relation of his right hand to the sound hole, he’d be strumming the bridge.