Taijitu seen in Tripilja culture in Ukraine, displayed in the Ukraine pavilion at the Expo 2010 in Shanghai, China. Also, the interlocking design is found in artifacts of the European Iron Age. While this design appears to become a standard ornamental motif in Iron-Age Celtic culture by the 3rd century BC, found on a wide variety of artifacts, it is not clear what symbolic value was attached to it. Unlike the Chinese symbol, the Celtic yin-yang lack the element of mutual penetration, and the two halves are not always portrayed in different colors. Comparable designs are also found in Etruscan art.
Yin and yang 阳 "sunny side" are linguistically analyzable in terms of Chinese characters, pronunciations and etymology, meanings, topography, and loanwords. The Traditional Chinese characters and for the words "yīn" and "yáng" are both classified as radical- esphonetic characters, combining the semantically significant "mound; hill" radical or with the phonetic indicators "ying" and "yang" . The first phonetic "yīn" "cloudy" ideographically combines "jīn" "now; present" and "yún" "cloud", denoting the "今 presence of 云 clouds". The second phonetic "yáng" "bright" originally pictured the "sun" with "rays coming down". This phonetic is expanded with the "sun" radical into "yáng" 暘 "rising sun; sunshine". The