Does the translation of documents for overseas visa need to be stamped?

The translation does not need to be stamped by the employer, but of course it is no problem if it is stamped. Original Chinese documents must be stamped.

A visa (visa) is an endorsement or stamp by a country’s sovereign authority on the passport or other travel documents held by its own 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 can also be said to be an endorsement-style 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 for entry to foreign citizens.