You don't need to know many guitar scales to play guitar solos ... You should be able to see that the C major pentatonic scale uses all the notes from a C chord, plus a couple of extras.

Major pentatonic scales are used a lot in folk music and Chinese music. They usually have a joyful feeling. They are also very good for solos and melodies played on the guitar.

This time, I’d like to demonstrate a soloing approach over this rhythm part, using both major and minor pentatonic scales, as well as some chromatic notes. Figure 1 illustrates the solo ...