people of which ethnic groups can be found here?
Han Chinese.
Ethnicity and language
Most of Guangzhou's population is Han Chinese. 
who was don bradman? He was an Australian international cricketer. where was he born? Cootamundra, New South Wales (NSW). what is the climate like in the latter? Arid to semi arid climate with rainfall. what languages are spoken here? English, Mandarin, Arabic, Cantonese, Vietnamese and Greek. where is the fourth one commonly spoken? Guangzhou and its surrounding area in Southeastern China. was this place a center of any revolution? Yes, the Uprisings of 1895 and 1911. does it have a twin town ? Yes.
Han Chinese Han Chinese and local Cantonese people Han Chinese
Guangzhou Guangzhou Guangzhou
Ethnicity and language Ethnicity and language Ethnicity and language
Most of Guangzhou's population is Han Chinese. Almost all of the local Cantonese people speak Cantonese as their first language, while most migrants speak forms of Mandarin. In 2010, each language was the native tongue of roughly half of the city's population, although minor but substantial numbers speak other varieties as well. In 2018, He Huifeng of the "South China Morning Post" stated that younger residents have increasingly favored using Mandarin instead of Cantonese in their daily lives, causing their Cantonese-speaking grandparents and parents to use Mandarin to communicate with them. He Huifeng stated that factors included local authorities discouraging the use of Cantonese in schools and the rise in prestige of Mandarin-speaking Shenzhen. Guangzhou has a very unbalanced gender ratio, but its province has a higher imbalance than the rest of the country. While most areas of China have 112-120 boys per 100 girls, the Guangdong province that houses Guangzhou has more than 130 boys Most of Guangzhou's population is Han Chinese. Almost all of the local Cantonese people speak Cantonese as their first language, while most migrants speak forms of Mandarin. I Most of Guangzhou's population is Han Chinese. Almost all of the local Cantonese people speak Cantonese as their first language, while most migrants speak forms of Mandarin
wiki:7699625
Guangzhou [SEP] Ethnicity and language
Most of Guangzhou's population is Han Chinese. Almost all of the local Cantonese people speak Cantonese as their first language, while most migrants speak forms of Mandarin. In 2010, each language was the native tongue of roughly half of the city's population, although minor but substantial numbers speak other varieties as well. In 2018, He Huifeng of the "South China Morning Post" stated that younger residents have increasingly favored using Mandarin instead of Cantonese in their daily lives, causing their Cantonese-speaking grandparents and parents to use Mandarin to communicate with them. He Huifeng stated that factors included local authorities discouraging the use of Cantonese in schools and the rise in prestige of Mandarin-speaking Shenzhen.