China's marriage law stipulates that married men are 22 years old and married women are 20 years old, and both parties can apply for marriage certificates voluntarily.

Li people also apply for marriage certificates in accordance with China's current marriage law, not 18 years old.

If 18-year-old people have children and live together, it is not a de facto marriage and is not protected by law.

There are still some people who get married under the legal age, and then reissue their marriage certificates after they reach the age, but if they have children at this time, they will not be able to register.

Therefore, the marriage conditions of Li people are the same as those of the whole country.