the world's leading financial centres and the Hong Kong dollar is the thirteenth most-traded currency in the world. Macau Macau native people are known as the Tanka. A dialect similar to Shiqi (), originating from Zhongshan () in Guangdong, is also spoken in the region. Parts of Macau were first loaned to the Portuguese by China as a trading centre in the 16th century, with the Portuguese required to administrate the city under Chinese authority. In 1851 and 1864, the Portuguese Empire occupied the two nearest offshore islands Taipa and Coloane respectively and Macau officially became a colony of the Portuguese Empire in 1887. Macau was returned to China in 1999. By 2002, Macau had become one of the world's richest cities and by 2006, it had surpassed Las Vegas to become the world's biggest gambling centre. Macau is also a world cultural heritage site due to its Portuguese colonial architecture. Culture The term "Cantonese" is used to refer to the native culture, language and people of Guangdong and Guangxi. There are cultural, economic, political, generational and geographical differences in making "Cantonese-ness" in and beyond Guangdong and Guangxi, with the interacting dynamics of migration, education, social developments and cultural representations. Language The term "Cantonese language" is sometimes used to refer to the broader group of Yue Chinese languages and dialects spoken in Guangdong and Guangxi, although it is used more specifically to describe Gwóngjāu wah (), the prestige variant of Cantonese spoken in the city of Guangzhou (historically known as Canton). Gwóngjāu wah is the main language used for education, literature and media in Hong Kong and Macau. It is still widely used in Guangzhou, despite the fact that a large proportion of the city's population is made up by migrant workers from elsewhere in China that speak non-Cantonese variants of Chinese and Standard Mandarin. Though in recent years it is slowly falling out of favour with the younger generation prompting fears in Cantonese people that the language may die out. Cantonese language's erosion in Guangzhou is due to a mix of suppression of the language and the mass migration of non-Cantonese speaking people in to the area. Because of its tradition of usage in music, cinema, literature and newspapers, this form of Cantonese is a cultural mark of identity that distinguishes Cantonese people from speakers of other varieties of Chinese, whose languages are prohibited to have strong influences under