Where can I get a Korean visa in Haixing County, Cangzhou City, Hebei Province?

Passports shall be handled by the Exit-Entry Administration Bureau of the local police station. You need to find an intermediary to apply for a study visa, and you can find a travel agency for a tourist visa. Or, for example, you can go to the embassy in official website to look at the required materials, and then fill out a form and submit the materials for the head of the embassy in your area.