Renew is a marker that users can disassemble it by twisting the pen to quickly replace the refill and reuse it. The nib has a flexible space to ensure full contact with the surface of the paper. In addition, it also features a coloring area to identify true colors. When the pen cap corresponds to the pen holder color, the tilt direction of the pen cap can indicate the tilt direction of the pen tip.

He is the founder of DAODUN, also a design educator and has won many international awards for both his students and himself, DAODUN combines teaching with social practice and creative teaching with product design to improve students' practical ability and cultivate students' thinking methods of creative product design. After a lot of practice, students can confidently step into work or have the ability to study abroad for further study, improve the background of designers, and provide designers to design companies. Dalton also cooperates with universities to develop design courses to serve more students studying design.

DAODUN gathers elite design talents and educational resources in the art and design industry, summarize years of design experience to create a new system of art and design education, improve the background of designers, and provide excellent design talents for the art and design studio at home and abroad.