Sun Tzu's Art of War said:  "Know yourself and know your enemy, and you will never be defeated." In order to let engineers know more about what hackers think to avoid coding loopholes, ProductHack is held inside Trend Micro every year. This year's conference theme was" Code ninja." Join the Dojo elements into the event, engineers compete with each other level by level. Visual Concept starts with the hacker ninja who rushing in the coding world.