Why does the United States always require China's exchange rate to let go and the appreciation of the renminbi. What does it mean to let go? What is the appreciation?

The appreciation of the renminbi means that the Chinese can buy more US dollars in the US dollar. On the other hand, Americans can only buy fewer units of RMB. For example, today's Chinese banana is $ 10. If the RMB appreciates the appreciation of the US dollar, assuming other factors Unchanged, then beautiful women (American women) If you want to eat Chinese bananas, you have to pay a higher price than $ 10, because the money in the beauty of the beauty has depreciated, and the value of Chinese bananas will not decrease. So why are Americans happy? It is said that the post -80s of the United States can not afford a room. It is not as old as the post -80s of China. The US factories have closed down. They wear clothes and pants produced in China, and even the sexual products used by their foreplay are processed and manufactured by Chinese companies. When they lack money to buy a house, they naturally think of after the productivity of China ’s world productive forces. Giant, the motto of the post -80s of the United States is to print more US dollars and then in the form of white strips in exchange for the beautiful MM and handsome GG of the post -90s and even the future post -90s. The surplus value of the private entrepreneurs of children ~.
I dare not be sure that my understanding is correct. If the wrong is outrageous, please ask the person to correct it, and be grateful! ~

Hello friends:
Is to answer the first question: The United States requires that the exchange rate is open, just to make the renminbi be appreciated quickly under the pressure of international forces, and then the United States makes improper benefits.
I answering the second question again: the appreciation of the renminbi is beneficial to the United States, because after the appreciation of the renminbi, the unit price of the products exported by China has increased, the market competitiveness is reduced, and the foreign trade income of China will eventually reduce. In addition, the appreciation of the renminbi, the United States can engage in the "currency war", allowing China's large amount of wealth into the United States.
The third question: letting go is to let the government do not interfere with the exchange rate trend and make the exchange rate fully market -oriented.
The last answer the fourth question: appreciation is only disadvantaged for China, but no benefit. Appreciation has reduced Chinese products overseas competitiveness, and a large amount of wealth in China flows into the United States, which ultimately affects the development and rise of China's economy.