1. Chollian, known for PC communications, will end its service at the end of October, marking the end of the era of PC communications in Korea; 2. The service operator, Mediawill, announced the final closure of Chollian services on October 31; 3. Chollian will open backup functions for email and address books from July 11, and will support data storage and email migration for users, with a complete service shutdown on October 31.