Liu bang ordered that/kloc-women over the age of 0/5 should increase taxes if they are unmarried. This? Single tax? But it's so high that ordinary families simply can't afford it. Even if those women didn't want to get married, ancient women didn't have jobs and sources of income, and they couldn't pay taxes themselves. Therefore, many families find their in-laws when their daughters are almost 15 years old, and get married quickly to avoid paying taxes. This policy has really worked, because the younger the marriage age, the more children will be born naturally, and the population will naturally grow rapidly.
Premature marriage does great harm to women. Liu Bang's original intention was to increase the population and promote social prosperity and stability. It was a good starting point, but getting married too early does great harm to women. In order to get their daughters married before the age of 15, many families will lower the requirements for men and increase the risk of marriage. At the same time, because this policy actually indirectly promoted the idea of son preference. Because after giving birth to a daughter, she will marry someone else in less than 15 years, and parents will definitely pay less attention to her daughter. Getting married too early is equivalent to giving birth too early, which is extremely harmful to women's health.
To sum up, Liu Bang's marriage policy has rapidly promoted the population growth, but premature delivery has caused physical harm to women, and the policy of blindly taxing unmarried women has also reflected the idea of son preference to a certain extent.