Why is the more gold a country has, the more valuable its currency is? If China discovers a big gold mine, will we become the richest people in the world?

Do you have money? For example, during the Republic of China, you bought a cow for 100 yuan at first, and a cabbage for 100 yuan a few years later! For example, if you only have a few hundred kilograms of gold in the lost desert, and another person has enough food and water, whose goods are more valuable? Let's talk about our real society, Chairman Mao's era, which was short of materials. If you want to buy cloth food, you need RMB plus food stamps and cloth tickets. Social affluence is related to productivity. Gold and paper money are just common equivalents. China has enough food, and everyone is really rich if they have enough to eat, wear warm clothes and live well! No food, no clothes, no shelter, just like Africans, only gold mines. Do you have money with you? For an individual, you have a lot of gold, and you are really rich. For the whole society (China), adequate food and commodities are the last word! There is no food in the desert, a glass of water with gold bars, like this! If one day there is no food in China and food can only be imported from the United States, maybe a gold bar can get a bag of rice! China is rich now, because of its strong productivity! But wealth is unevenly distributed!