Yang Long is very valuable. Yuan Datou and Yang Long are both modern currencies in circulation. In the collection market, in the third year of the Republic of China, the price of general products in Yuan Datou was about 1.05 yuan, and that of American products was more than 1.200 yuan. In the third year of Taisho, the average product in Yang Long was about 2,800 yuan, and the American product was more than 3,000 yuan. So Yang Long is more valuable than Yuan Datou. Yuan Datou belongs to the Republic of China, and Yang Long is the currency circulated by the late Qing government.