In autumn, the climate gradually changes from cool to cold, and the crabs gradually grow stronger. The digestive glands and ovaries of the female crab grow into crab roe to prepare for the winter and the need for reproduction in the coming year (the crab roe turns into crab roe in spring). At this time, when you peel off the crab shell, you can see that there are a lot of yellow and sticky things in the crab shell and crab lumps, which is raw crab roe. After being cooked, the crab roe turns red, and the darker the red, the stronger the crab. In order to prepare for the winter, male crabs gradually accumulate fat and grow into crab paste (commonly known as crab oil). When you peel off the shell of a male crab, you will see something white and sticky in the same place, which is crab paste (crab oil). After cooking, the crab paste becomes translucent. The more crab paste there is, the stronger the male crab is. Crab roe and crab paste are not only delicious, but also rich in nutrients. They are the essence of crab. In the wild environment, in September of the lunar calendar, the crab roe of female crabs is the most plump; in October, the crab roe of male crabs is the thickest. Therefore, in the past, there was a saying of "nine females and ten males" when eating crabs. Meaning: Female crabs are eaten in the ninth month of the lunar calendar, and male crabs are eaten in the tenth month of the lunar calendar.