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.
The yuan (/juËËÉËn, -Ã¦n/; sign: Â¥; Chinese: å; pinyin: yuÃ¡n; ( listen)) is the base unit of a number of former and present-day Chinese currencies, and usually refers to the primary unit of account of the renminbi, the currency of the People's Republic of China.