What are China's neighbors?

Russia, North Korea, Mongolia, Kazakhstan, Tajikistan, Kyrgyzstan, Afghanistan, Pakistan, India, Nepal, Bhutan, Myanmar, Laos and Vietnam.

Visa:

It is the annotation and seal of the sovereign organ of a country on the passport or other travel documents held by its own or foreign citizens to show that they are allowed to enter or leave their own country or pass through their own country. It can also be said that it is an endorsement certificate issued to them. Generally speaking, a visa is a document issued by a country's entry-exit administration (such as immigration bureau or its embassy or consulate abroad) to approve the entry of foreign citizens.

No country can enter at will, otherwise its territorial sovereignty will be violated, and foreign citizens need to apply for visas when they are approved to enter the country.

References:

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