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.
Mandarin is now the official language in China and Taiwan and is used by most of the Chinese schools, colleges and universities, as well as their TV programs, movies, and radio stations. Mandarin is also one of the six official languages in the United Nations.