The three religions (삼교) of East Asia - China, Korea, Japan - are depicted in Asian art through color, lines, stroke, stylization of humans and nature, etc. The three long-standing East Asian religions are:
Confucianism - deals with relations between humans; ascetic philosophyAmong these three religions, Confucian and Buddhist beliefs are readily distinguishable and art imagery easily can be distinguished between the two. Taoism, on the other hand, was introduced to Korea thousands of years ago and at an unknown time. Taoist principles of nature are so deeply entrenched within the traditional agricultural society that it is hard to say whether a belief on nature is based on Taoism or was just a development of pastoral enjoyment of the nature in the agricultural country.
..... filial piety - the relationship between father and son
Paintings source here along with many more beautiful Confucian art paintings.