1. Commemorative coins are legal tender in People's Republic of China (PRC), issued by the People's Bank of China, with 3 pieces of * * *, including 2 gold coins and 1 silver coin 1 piece. On the front, the designs are all signs of planetary exploration in China, and the country name and year number are "202 1". On the back, the theme is the first Mars exploration mission "Around the Moon, Landing and Patrol", and "Tian Wen No.1, China's first Mars exploration mission" and its name are published. Commemorative coins concentrate the vast space on one square inch, making the spacecraft jump off the surface of gold and silver coins. It is a combination of science and aesthetics to adopt the design method of combining realism with freehand brushwork, and to adopt classic coin-making techniques such as mirror, sandblasting and multi-level sandblasting, which has important commemorative significance and artistic value. It is understood that this commemorative coin is the seventh set of gold and silver commemorative coins with the theme of aerospace in China. Prior to this, precious metal commemorative coins were issued in major space events such as the 40th anniversary of the founding of China Aerospace, the first manned space flight, the first flight to the moon, the first spacewalk, the opening of Beidou satellite navigation system, the first landing on the moon, etc., bearing in mind the exploration achievements of China Aerospace in climbing scientific and technological peaks, showing astronauts' scientific dreams and enterprising attitude, and showing China people's cultural self-confidence and romantic feelings.
2. Commemorative coins are legal tender issued by a country to commemorate major international or domestic political, historical and cultural events, outstanding figures, places of interest, rare animals and plants, sports events, etc. They include ordinary commemorative coins and precious metal commemorative coins. General or refined quality, limited distribution. Ordinary commemorative coins can be circulated, but precious metal commemorative coins cannot be circulated. Chinese commemorative coins are legal tender designed and manufactured by China Banknote Printing and Minting Corporation and issued by China People's Bank. Commemorative coins are usually issued to commemorate major political and historical events, traditional culture and other events of special significance in China. Ordinary commemorative coins have the same function as the RMB currently in circulation, which is equivalent to the RMB with the same denomination.