On this day, 45 years ago, on April 1, 1980 (February 16, 1980, the lunar calendar), China began to issue foreign exchange certificates. On April 1, 1980, the State Council authorized the Bank of China to issue foreign exchange certificates in China. The State Council stipulates that foreign exchange certificates are RMB certificates containing foreign exchange value. When foreigners, overseas Chinese, and compatriots from Hong Kong, Macao and Taiwan enter China, they must convert the foreign currencies they hold into foreign exchange certificates at the banks of China or designated foreign exchange exchange points at the current exchange rate, and use them equally with RMB within the specified range. Use exchange coupons to purchase some urgently needed goods that cannot be purchased in RMB. There are seven denominations of foreign exchange certificates: 100 yuan, 50 yuan, 10 yuan, 5 yuan, 1 yuan, 50 jiao, and 10 jiao. Their official exchange price has always been far from the black market price. According to regulations, private exchange is not allowed. Foreign exchange certificates may be a unique kind of "paper" in the world. Later, when there were more things, RMB could buy anything. You didn't have to look at your passport when you entered the Friendship Store. On January 1, 1995, foreign exchange certificates ended their historical mission. Some people started collecting it.