What are the visa & residency requirements in Wuhan?

"In order to visit Wuhan, travelers must obtain a visa from the Chinese Embassy or Consulate in their home country. The process of applying for a visa involves submitting an application form, a valid passport, a passport-sized photo, and other documents such as proof of financial means and a letter of invitation from a Chinese citizen or organization. In order to obtain residency in Wuhan, China, applicants must first obtain a residence permit from the local public security bureau. The process of applying for residency involves submitting an application form, a valid passport, a passport-sized photo, and other documents such as proof of financial means, a letter of invitation from a Chinese citizen or organization, and proof of employment or study in China," remarked another expat in Wuhan, China.