2. Optimistic and positive, willing to undertake tasks, not picky;
3. Be good at rest and sleep well;
4. Strong adaptability and adaptability to various environmental changes;
5. Have certain resistance to common cold and infectious diseases;
6. Appropriate weight, well-proportioned posture, and coordinated proportion of head, arms and buttocks;
7. Bright eyes, sharp reaction and no inflammation in eyelids;
8. The teeth are clean, no defect, no pain, normal gum color and no bleeding;
9. Smooth hair, no dandruff;
10. Muscles and skin are elastic and easy to walk.