Yes, the flights of China Southern Airlines usually provide meals and drinks. Even if you don't choose specific meals, you will also provide default meals and drinks. This is because on the flight of China Southern Airlines, meals and drinks are one of the services included in the ticket price, and the flight of China Southern Airlines usually lasts for several hours, so it is necessary to provide meals and drinks.

However, it should be noted that meals and drinks provided by different flights and cabins may be different, and the specific types and quality of meals and drinks may also be different due to different flights and cabins. If you have special requirements for meals, or need more information about the meals and drinks provided on China Southern Airlines flights, you can contact the customer service of China Southern Airlines or inquire about relevant information in China Southern Airlines official website.