The life span of string dogs is generally 13 years to 17 years. Because each dog's own physical quality is different, then the dog's life span will be different. The life span of a dog is inseparable from the quality of its owner's usual feeding and management. To prolong the life span of dogs, it is necessary to do a good job in the usual feeding management, such as developing good work and rest and hygiene habits for dogs, giving dogs a general checkup regularly, keeping their food clean, and communicating with dogs more.