Goods worth 1 dollar in the United States can be bought for $8 in China?

It can't be said that if you buy the same goods separately, it also involves customs duties, value-added tax and other taxes, so a commodity sold in the United States at the price of 1 USD will definitely be higher than the equivalent RMB of China 1 USD. People in one country cannot be directly compared with people in other countries. After all, the consumption level of each country is different. For example, in the United States, he earns $20 a day (130 yuan RMB), but the price of his eggs is 1 cent (6.8 yuan RMB), while in China, he earns 30 yuan RMB 3 cents a day, which is totally incomparable. Foreign exchange and customs exist to coordinate the consumption level among countries. That's all I can understand. Not deep.