Exercise, the act of strengthening or perfecting a skill or a part by repeating an action.
Wushu: refers to all kinds of fighting techniques with fitness as the main purpose (more performances)
Wu: Various fighting techniques usually refer to the systematic martial arts system in China for thousands of years.
Gong: Internal work, namely Qigong, stimulates various functions of human body through bioelectricity and is an important part of traditional martial arts in China.