Yup~ these are paintings I had done when I was in high school.
My high school in Taiwan "Fu-Hsin Trade & Arts School" is a vocational art school.
We had to learn all kind of drawing, painting, design (graphic design, interior design), block printing, crafts, and even photography skills.
This is a huge painting ~ about the same height as me
(lazy to check the exact size of canvas)
yes I like to use yellow for my painting :P