Please help me see if this English sentence is correct

The first sentence: welcome-welcomed

The second sentence: guests-guests. There is no need to add to factory. If you want to express "company", company can be used. Factory refers to the factory, which is large. A more formal, formal company usually uses "corporation"; if you are welcoming their company to your factory, add our, that is, welcome all the guests of **** company to our factory

Additional questions and banners Translated, it becomes: "All guests are warmly welcomed",

You can use

"Warmly welcome to all the guests!"

or

"Every honored guest, welcome to visit our corporation", dear guests, welcome to our company!

Foreign companies generally use corporation, and this is more appropriate because It represents a company with a certain scale and perfect management

The second one is more humane, because it is specific to "each distinguished guest" and not so formulaic.