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 vs Cantonese. As two major languages spoken in China, the difference between Mandarin and Cantonese is very interesting topic to a linguist. The official language of China is mandarin, which is one of the few official languages at UN also. However, it is one of the five major languages in mainland China that also includes Cantonese language.