1, if the length of the wound or scar on the limb skin exceeds 10. Ocm will cause minor injuries;

2, a single facial wound or scar length more than 4.5cm for minor injuries.

It is the degree of injury that determines whether to bear criminal responsibility. If the forensic expert's conclusion is minor injuries or above, he shall bear criminal responsibility. However, if there is only one wound a few centimeters and there is no tissue damage, it may only be considered as a minor injury, so there is no criminal responsibility. If it constitutes a minor injury or more, it is suspected of intentional injury and shall be investigated for criminal responsibility according to law; Those who are slightly injured shall be sentenced to fixed-term imprisonment of not more than three years, criminal detention or public surveillance. The court will comprehensively consider mitigating circumstances such as criminal motive, subjective malignancy, social harm, recidivism, surrender, meritorious service, and the attitude of the parties to plead guilty.

Criteria for wound identification:

1, the lower limit and upper limit of minor injuries are connected with the minor injury identification standard (trial draft), and those who fail to meet this standard do not constitute minor injuries;

2. Scalp abrasion area is above 5cm2; Scalp contusion; Subscapular hematoma;

3. Scalp trauma;

4. After head trauma, there are indeed neurological symptoms;

5. The area of soft tissue contusion of limbs is above 65438±05 cm2; The wear area is above 20cm2;

6, limb skin and subcutaneous tissue wound length lcm or more, stab to the muscle layer.

To sum up, the relationship between the length of wound and the constitution of criminal cases can not be generalized, but must be determined by combining various parts and charges. In addition, the injury can only be legally effective if it is appraised by a qualified hospital entrusted by a forensic doctor or a public security organ.

Legal basis:

Article 234 of the Criminal Law of People's Republic of China (PRC)

Whoever intentionally harms another person's body shall be sentenced to fixed-term imprisonment of not more than three years, criminal detention or public surveillance.

Whoever commits the crime mentioned in the preceding paragraph and causes serious injuries shall be sentenced to fixed-term imprisonment of not less than three years but not more than ten years; Whoever causes death or serious disability by particularly cruel means shall be sentenced to fixed-term imprisonment of not less than 10 years, life imprisonment or death. Where there are other provisions in this Law, such provisions shall prevail.