The standard language is Mandarin, which was established with reference to the Beijing dialect, but other dialects such as Yue (Cantonese) and Wu (Shanghainese) are also spoken.

---
For those interested in learning more about daily life in China, please also check out this article.

What is Real Life in China? Daily Habits and Current Trends Marketers Should Know
・Urban Housing Conditions: Surprisingly Not That Spacious? Floor Plans and Features
・Ways to Maximize Space Utilization
・Refrigerators in the Living Room? And Entranceways: Different Approaches Compared to Japan
・Chinese Households Focusing on Indoor Air Quality
etc.

Reference Japan, China, Korea, Singapore, Vietnam, Germany, and UAE Central　Intelligence Agency, "The World Factbook: LANGUAGES" Retrieved July 27, 2020, from https://bit.ly/2ErAba3 Taiwan National Statistics, Republic of China (Taiwan) "2010 Population and housing Census", "Table 6 Languages used at home for the resident nationals aged 6 years and over by sex and age" Retrieved July 27, 2020, from https://bit.ly/2X06mne Hong Kong, Thailand, Indonesia, Philippines, India, United States, United Kingdom United Nations Statistics Division "Demographic Statistics Database: Population by language, sex and urban/rural residence" Retrieved July 27, 2020, from https://bit.ly/3f7ChbQ