In relation to the first situation that you have described (should there be review & photos that would seem inappropriate/not correct), I would suggest you instructing your friend, should the business has been claimed and they have registered via Google My Business, to take a quick look at the instructions on how to Flag inappropriate reviews.
You would be reached out via private message for further instructions on the second matter.
I just wanted to let you know also, as English is the language in the post, the language tag of Vietnamese would be revoked.