Ziwei Baihua flag head

Generally speaking, not. Signing a complicated process in a big company is very slow, especially the offer, which is signed by the biggest boss of HR. The boss at this level often travels, even if he can't sign it within two weeks. It must be a bad company to give you an offer verbally and not inform you of your entry. It's not a pity not to go. If you really don't feel at ease, you can also ask the person who gave you an oral quotation.