Taijiquan is the pinyin version of spelling T'ai Chi Ch'uan (which is also sometimes seen as tai chi chuan, taichichuan, tai chi, taichi, or taiji). Pinyin is the system adopted in 1979 for transliterating Chinese ideograms (characters) into the Roman alphabet (pinyin is the official system of romanization for China and became the United Nations Standard in 1977). For example, the old Wade-Giles system spells the capital of China as Peking, but using the newer pinyin system, Peking is now known as Beijing.