1. Apply for a Korean visa: Although you have a job and residence in Italy, you still need to apply for a Korean visa. You can learn about the specific requirements and procedures for applying for a Korean visa through the website of the Korean Embassy and Consulate in Italy.
2. Confirm the validity of your passport: Before applying for a Korean visa, please make sure that your passport is valid for at least six months beyond the time you plan to stay in Korea.
3. Buy air tickets: Before buying air tickets, please make sure that your visa has been approved and your passport and visa are ready.
If you want to return to China first, you need to apply according to the requirements of the China Municipal Government. You need to apply for entry at China Customs with valid passport, visa and air ticket reservation information. Please note that China Customs may require you to provide more information and documents according to your specific situation, such as entry permit, health certificate, etc.
No matter whether you are going to South Korea or China, it is recommended that you consult the local immigration bureau or relevant agencies in advance to ensure your trip is smooth and avoid any possible delays or problems.