Can the postal express visa order be canceled?

Yes, just go to the relevant department to cancel.

A visa (visa) is an endorsement or stamp by a country’s sovereign authority on the passport or other travel documents held by its or foreign citizens to indicate that they are allowed to enter or exit the country’s territory or pass through the country’s territory. It is also a formality. It can be said to be an endorsement certificate issued to them.

In summary, a visa is a document issued by a country's entry-exit management agency (such as the Immigration Bureau or its embassy or consulate abroad) to express approval of entry to foreign citizens.

A passport is proof of the holder’s nationality and identity, while a visa is a permit issued by a sovereign country to allow foreign citizens or its own citizens to enter or exit the country or pass through the country’s borders.

Visas are generally endorsed on the passport, and some are endorsed on other travel documents that replace the passport. Some also issue separate visas. For example, the immigration visa of the United States and Canada is a piece of A4-sized paper. Singapore also issues a separate visa to foreigners. Generally speaking, the visa must be used together with the passport to be valid.