Jing in Chinese / Japanese...

易經 is the Chinese title for “The Book of Changes,” also known as “I Ching” or “Yi Jing.”

靜 is the simplest way to convey the meaning of inner peace and serenity.

靜 is often translated as “serenity.” It can also be used to express the ideas of still, calm, serene, quiet, silent, stillness, not moving, or tranquility.

In the old days, Chinese, Japanese, or Korean people might hang a wall scroll with this character in their reading room to bring about a sense of peace in the room.

While they once used the same character form in Japan, they now use a slightly-simplified version in modern Japan (after WWII). This version is shown to the right, and can be selected for your wall scroll by clicking on that Kanji instead of the button above.

See Also:  Peace

精武 is the title used for a certain type of martial arts. You can translate this roughly as “Excellent Martial Arts” or “Excellence in Martial Arts.” You will notice that the second character is “wu” as in wushu (martial arts) and wushi (warrior).

More information can be found at the Jing Mo website. You should probably only order this if you are a member of this association.

Note that “jing mo” is the Cantonese pronunciation of these characters. In Mandarin, they are “jing wu.”
Also used in Korean but only by those involved with martial arts who can also read Korean Hanja (a small percentage of the population).

精, 氣, 神 are the characters jing, qi, and shen.

As a set, these three characters are known in English as the treasures of traditional Chinese medicine, the treasures of Qi Gong, or the three treasures of Taoism / Daoism.

Sometimes this set is titled 三寶 (sānbǎo) or “three treasures,” but here, we're writing each treasure out.

Here's how these characters are perceived in this context...
Jing: nutritive essence; refined; perfected; pure
Qi: vitality; energy; force; breath; vigor
Shen: spirit; soul; mind; being

To keep it simple, you can use “essence, vitality, and spirit” to define these.

鏡 is a Chinese character, Japanese Kanji and Korean Hanja that means mirror.

It can also mean lens or looking-glass depending on context.

In Buddhism, this is the equivalent of ādarśa from Sanskrit meaning a mirror.

淨 is the most simple way to express purity or cleanliness in Chinese, Japanese Kanji, and old Korean Hanja.

As a single character, the concept is broad: This can be a verb (the act of cleaning, purifying, or cleansing) but it can also be the state of being clean, pure, and chaste. In some contexts, it can be a place to clean (like a bathing room for the soul in a Buddhist context). In Japanese, this can be a female given name “Jou” or “jō” (the Japanese equivalent of the English girl's name “Chastity”).