The subject wants to ask "how to write the introduction of painter certification", which is written as follows:

1, I am Zhang San, an enthusiastic painter. My paintings show the beauty and harmony of nature with unique colors and lines.

2. I am Li Si, a painter who focuses on watercolor painting. My works are famous for their fresh and delicate watercolors, which show the beauty and agility of nature.

I am Wang Wu, an artist who loves painting. My works cover oil painting, watercolor painting, sketch and other painting forms, showing my unique view of life and awe of nature.