How can a Bangladeshi citizen obtain a second entry with a single-entry non-immigrant business visa in Thailand?

A Bangladeshi citizen with a single-entry non-immigrant business visa can obtain a second entry by purchasing a re-entry permit. This permit can be acquired either at the immigration office in Thailand or at the airport prior to departure. It is important to note that while the re-entry permit prevents the visa from being canceled upon exiting the country, it does not extend the duration of the visa.