I've spent 30 minutes on this artwork. Ink on A4 size paper.
This is an entry for a drawing contest by @sirsensei which you can take part here with the theme, Sensei. Sensei is a Japanese honorific term that is literally meant as the person born before another. This can be translated as a teacher or a master too.
Master Roshi from the Dragon Ball is the first Sensei to Goku. His most destructive skill is the Kamehameha which he taught to Goku later. He is the most humane role in the comics too for being a good teacher, righteous hero at some crucial moments. He too has some weaknesses like his lust for women, sometimes taking petty advantages of others. Overall, he is the first one came to my mind for the Sensei theme.
这幅作品花了三十分钟来完成，主要用的是墨笔在 A4 纸上。
此作品将会用来参加 @sirsensei 所举办以 Sensei 为主题的绘画比赛。 Sensei 是日本字，在中文同意同音先生。通常有着老师，师傅和达人等意思。
来自七龙珠的龟仙人是第一个出现在脑里 Sensei 代表。他是悟空在书里的第一个师傅，传授了他最厉害的招式，龟波气功。龟仙人也是一个很人性化的角色。作为一个师傅，他正义，识大体，在危急关头懂得挺身而出。当然他也有不少弱点，平时有点贪生怕死，还非常好女色，懂不懂看到美女就流鼻血，非常搞笑。
Breakdown of drawing
Rough sketch using pencil.
用铅笔浅浅的草稿。
Outline the character using an ink pen, starting from the head first.
然后用墨笔把线条画出来，先从头部开始。
Continue to the body.
在接下来到身体部分。
Erase those pencil sketch after the complete outline is done using an ink pen.
完成墨笔划线部分后，把铅笔草稿擦去。
Using a pencil to tone the shape of shadow, no smudging is needed. Enclosed the image with a marker without proper dimension square with giving the drawing more comics feel.
最后使用铅笔加上阴影部分，这里不需要晕染。我也将图像用不规则的长方形框起来，看起来更有点漫画气息。完工啦。
