Grandmaster (martial arts) of "Dan" rankings and Black belt and Red belt in martial arts both derive from Judo where they were adopted by its founder Kanō Jigorō. There are many terms similar or equivalent to 'grandmaster' used by various martial arts traditions. Some of these terms derive from older systems, while others are relatively modern. Japanese martial arts commonly use Sensei (先生) meaning "teacher" or literally translated, "born first" or "one who has gone before". A "Sensei" is a person who has knowledge and is willing to teach that knowledge to another. A "Sensei" assists students in "ken shiki" "the pursuit of
Martial arts of Zhou Tong Pinghua" (扬州评话 – “Yangzhou storytelling”) folktale called "Meeting Zhou Tong by Chance", “Among the itinerant people of the this man was of illustrious fame, a fame reverberating like thunder, an expert in both civilian and military matters. Iron Arm Zhou Tong, Old Master Zhou!” (“Iron Arm” being his martial nickname.) Another source makes the bold assumption that he was "known as the greatest of grand-masters of all times in the history of Chinese martial arts and has many disciples who scattered across the country to teach the martial arts and all the culture involved in its knowledge, such as calligraphy,