If the visa is refused, should I stamp my passport or stick a refusal paper?

There will be no seal on the passport, and there will be no sticker on the passport. Send a refusal letter directly to prove that the visa applied for this time has been rejected.

Visa refers to the procedure of endorsement and seal of passports or other travel documents held by domestic or foreign citizens by the sovereign organs of a country to show that they are allowed to enter, exit or transit. 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.