Diamond enhancements are specific treatments, performed on natural diamonds (usually those already cut and polished into gems), which are designed to improve the visual gemological characteristics of the diamond in one or more ways.
Mandarin is the language of instruction of China and Taiwan. Mandarin is one of five major regional languages of China. It spreads wider than any other regional language, from the whole northern part of China down to Yunnan Province in the southwest corner of China.
Chinese (æ¼¢èª) comprises of seven main dialects, Mandarin (å®è©±), Cantonese (å»£å·è©±, å»£åºè©±), Hakka (å®¢å®¶è©±), Wu (å³èª), Min (é©èª), Xiang (æ¹èª), and Gan (è´èª) (figure). The variety of Mandarin based on the speech in the capital Beijing is the official national language of mainland China and is termed PÅ­tÅnghuÃ  (æ®éè©±, Common language). The common language in Hong Kong and overseas Chinese communities is Cantonese. The major languages spoken in Taiwan are Mandarin, Taiwanese (a variety of Min), and Hakka. Six of the seven main dialects are in the southeast of Chinese, south of the Yangtze river. Mandarin is spoken in most of northern China and part of western China. The Chinese dialects are not mutually intelligible but are termed dialects from sociological and political points of view. Most of the dialects are themselves composed of a number of non-mutually-intelligible subvarieties.