1 Down syndrome, usually is caused by an extra copy of chromosome 21 (trisomy 21). Characteristics include decreased muscle tone, asymmetrical skull, slanting eyes and mild to moderate mental retardation.  Edward's syndrome, which is the second most common trisomy after Down syndrome. It is a trisomy of chromosome 18.
Guanxi describes the basic dynamic in personalized networks of influence, and is a central idea in Chinese society.
Traditional Chinese medicine (Simplified: ä¸­å»å­¦; Traditional: ä¸­é«å­¸; Pinyin: zhÅngyÄ« xu) is the name commonly given to a range of traditional medical practices used in China that have developed over the course of several thousand years of history.