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Last name Sanchun (三春 , Sanchun ) , around the world, is a rare cognomen. The surname Sanchun is habitual in Costa Rica, where it is quite a rare surname, China, where it is a very rare surname, and Peru, where it is an extremely rare surname. Not in comparison with a country's population, this name is the most popular in China, Costa Rica, and Mexico. More frequently, Sanchun is the forename as well as the last name.