Born in Hsinchu, Taiwan in 1977, Li Cheng-Guei graduated with a Bachelor of Fine Arts from National Taiwan Academy of Arts (now National Taiwan University of Arts) in 2000 with a double major in oil painting and mixed media. After graduation, she began to organize drawing lessons that are dedicated specifically to marker pen art, with the aim of passing on her experience to future generations. She is currently an art instructor in the department of design of different schools and the chief lecturer/ teaching spokesperson in Taiwan for COPIC, a Japanese brand of professional quality markers.

Li, who specialises in graphic design, is committed to promoting marker pen art drawing. With more than 20 years of teaching experience in marker pen art, colored pencil drawings and sketches, she not only has an accurate perception of the shape and color brightness of objects, but also acquired a sound knowledge of light and shadow. Li often says, “None of the tools is hard to use, it's just that you have not understood them. Regardless of whether you are familiar with the object or your drawing style, you must first understand the composition. Once the proportion is correct, drawing would become much easier.”