Are all the ingredients delivered by catering companies purchased by themselves?

Large chain hotels have their own supply and distribution kitchens, which are generally called central kitchens, but generally small hotels are their valued suppliers and can deliver as required. They also generally don't go to the scene to choose, waiting for inspection. However, the flowers in small restaurants are usually picked by chefs or bosses themselves in the vegetable market, and they are sold cheaply, bargained and selected, so the chefs in small restaurants are very tired.