What do I need to know before moving to Guangzhou?

"It is important for expats to research and become familiar with the language and culture of Guangzhou before relocating. Additionally, expats should research visa options, whether they need to obtain a visa before arriving, or if they need to apply for one after being in the city. Expats should also research housing options to determine the best area to live that fits their accommodation needs. Furthermore, expats should be aware of health risks and medical insurance requirements for living in China. Additionally, Guangzhou has a high level of air pollution, so expats should take precautions to protect their health and well-being," mentioned another expat when asked about moving to Guangzhou, China, China.