What are the visa & residency requirements in Colombo?

"In order to visit Colombo, visitors must obtain a visa prior to their arrival. The process of applying for a visa involves submitting an application form, passport-sized photographs, and a valid passport to the Sri Lankan Embassy or Consulate in the visitor's home country. The visa application must also include proof of sufficient funds to cover the duration of the stay, as well as a return ticket. In order to apply for residency in Colombo, Sri Lanka, applicants must submit an application form, passport-sized photographs, and a valid passport to the Sri Lankan Embassy or Consulate in their home country. The application must also include proof of sufficient funds to cover the duration of the stay, as well as a return ticket. Additionally, applicants must provide proof of employment or business in Sri Lanka, as well as a valid work permit. Once the application is approved, the applicant will be issued a residency permit," mentioned another expat when asked about moving to Colombo, Sri Lanka.