Can I use the automatic extension lease contract to extend my visa in Korea?

South Korea's visa extension can use the automatic extension rental contract.

Before any visa expires, I have to go to the exit-entry administration office with relevant formalities and documents for extension. It's better to be one month in advance, or you will be deported if you are late. The State Administration of Immigration entrusts the exit-entry administration agencies of public security organs at or above the prefecture level (including counties under the jurisdiction of municipalities directly under the Central Government) to accept foreigners' visas.

Precautions for visa extension:

Foreigners who need to stay in China for non-diplomatic or official reasons after entering the country with an ordinary visa may apply to the exit-entry administration of the public security organ for visa extension, renewal and replacement. I go through the relevant formalities in the exit-entry administration department of the public security organ, and the invited units or individuals, relatives of the applicant and relevant secret service agencies can apply for it on my behalf.