Jeong in Chinese / Japanese...

鄭 is the Chinese surname Zheng, Japanese surname Tei, Korean surname Jeong, and Vietnamese surname Trịnh.

This can also refer to the state of Zheng during the Warring States period of China.

In Korea, this can be the original way to write the surname Jeong in the old days (now it's 정 in modern Korea). Can also romanize from Korean as Chung or Jung.

In Japanese, this is the surname Tei. But can romanize as the following Japanese names/surnames: Ti; Te; Tsun; Dziyon; Chiyon; Chon; Chou; Chun; Chuu; Chien; Zen; Jiyon; Jon; Jou; Jun.

In Vietnamese, this is the name Trịnh from the time before Vietnam romanized the language.

情 means feelings, emotions, passions, and sometimes refers to the situation you are in (with your emotions).

At least, this is the definition in Chinese and Japanese. This word is a bit stronger in Korean Hanja, where it means affection, love, compassion, sympathy, tender feelings, and emotions. Just as in Chinese and Japanese, this can also refer to your circumstances or your facts of life in Korean.
情 is also the original Korean Hanja for the surname Jeong (정).

In Japanese, this can be the surname Sei.

This is the Korean martial arts title Jung Sim Do.

The official romanization should be Jeong Sim Do (thought in Korean, the J is almost a "Ch" sound) and other will romanize as Jung Shin Do.

The meaning is straight/right heart way. If you want this written in Hangul (정심도) in stead of Hanja (正心道), please click on the Hangul characters next to the Korean flag above.

廉耻精進忍耐遵守克己謙遜百折不屈 are the tenets of Tang Soo Do.

After some research, it appears this list was compiled in English based on Taekwondo tenets. We filled in a few of the words that did not have a corresponding Hanja or Hangul. If someone else has a better list with characters included, please contact me.

谦逊正直温柔忍耐克己不屈 are the virtues used by Choi Kwang Do Martial Arts.

The characters shown here are in the ancient Korean Hanja form of writing. If you wish for a Korean Hangul form of these tenets, we can arrange that with our Master Calligrapher Xing An-Ping (click on the Hangul next to the South Korean flag above to order this in Hangul).

跆拳道精神禮義廉耻忍耐克己百折不屈 is General Choi's writing that is often called “The Tenets of Taekwon-do.”

The actual title would be translated as “Taekwondo Spirit” or “The Spirit of Taekwondo.” It was originally written in Korean Hanja (Chinese characters used in Korea for about 1600 years).