Ancient Chinese kitchens were known for their practicality and attention to detail, and some of them incorporated built-in wine racks. These kitchens were typically spacious and had separate areas for cooking, food preparation, and storage. The built-in wine racks were often made of wood or bamboo and were used to store and age wine. Wine was considered a luxury in ancient China, and having a built-in wine rack in the kitchen was a sign of wealth and social status.