The passport visa has expired, but there is a foreigner landing permit in Korea. Can I go back to Korea after I return home?

No, your visa has expired and you will be stopped when you go through customs, so you can't go out. You can go to Korea with a foreigner's landing card, which is a symbol of this ID card in Korea. Visa and landing permit are both indispensable. You can take the landing card to the embassy to renew it.

According to the principles of international law, any sovereign country has the right to decide whether to allow foreigners to enter or leave the country, and to issue visas, refuse to issue visas or announce the cancellation of visas already issued according to its own laws.

Visas are generally endorsed on passports, some are endorsed on other travel documents instead of passports, and some are issued separately. For example, immigration visas in the United States and Canada are A4 paper, and Singapore also issues separate paper visas to foreigners. Generally speaking, a visa must be used at the same time as a passport to be valid.

Extended data:

There are three ways for China citizens to apply for foreign visas:

1. I apply directly to foreign embassies and consulates in China;

2. Entrust the visa office of China Travel Agency (generally limited to tourist visas);

3. Foreign relatives and friends apply for visas directly to the country's immigration bureau.

References:

Baidu encyclopedia-visa