Reply 12# Usually, money always refers to 1000 copper coins, but in the Song Dynasty, it was popular to save money, "77 yuan and 100 yuan" (Song History 180). That is, the consistent money is 770 yuan. As for the conversion of copper coins and silver coins, it changed with different dynasties: the conversion ratio of silver coins in the Northern Song Dynasty and the early Song Dynasty was one or two silver coins to consistent money, and when Hui Zong arrived, it was one or two silver coins to two money. As for the mid-Southern Song Dynasty, one or two pieces of silver were exchanged for three coins. But it is worth noting that copper coins, not silver coins, were usually circulating in the market in the Song Dynasty. Therefore, the conversion of silver and copper coins does not affect our price calculation. At that time, thirteen years later, Shaoxing Garrison completely controlled "200 yuan every month" and "Kloc-0/50 yuan every month". At the end of Emperor Gaozong's reign, the masterpiece of "Wu Yong played for nine yuan a month and fought for nine meters" was thick. (Xiangshan Volume 20) Considering that a person ate two liters of rice a day at that time, a month later, he ate sixty liters of rice, that is, six buckets. Besides, he has to support his family, and nine bushels of rice is not much. The "generous" here should refer to money. Since nine dollars a month can be considered generous, five hundred dollars should be a lot of income for a family, and underwear and food will be safe for at least five years.