It would have big signs facing the street, advertising the type of cuisine that it serves, special dishes, etc. Not for this restaurant.
This one is on the second or third floor of a commercial building in Tsim Sha Tsui East. A normal restaurant would have prominent signs to help customers from the street to find the restaurant. Not for this one.
Inside most restaurants, they have big, mouth watering pictures of seafood, ducks, chicken, and other appetising dishes on the walls, to entice people to open their wallets. Not this one.
Instead, there are signs warning you from bagging the leftovers, not to leave the restaurant, where the tour guides should eat, etc.
It is, of course, a restaurant specially designed to cater for tourist groups from Mainland China. Local people are not welcome.
Such is your (our?) Hong Kong.