1. First question: RMB appreciation means that the RMB needed by importing enterprises to import goods with the same US dollar is reduced, which directly reduces the import cost of importing enterprises and promotes import enthusiasm. For the United States, the export to China is guaranteed.

2. Question 2: China is the direct quotation, and China's foreign exchange rate is expressed by the amount of foreign currency converted into RMB (100 foreign currency). The greater (rising) this foreign exchange rate means that the exchange rate of foreign currency against RMB rises, which in turn devalues RMB. The price of RMB converted into dollars (that is, the amount of RMB converted into dollars) fell.

It should be noted that the expression of the second topic is problematic and not professional enough. It can't be said that "the foreign exchange rate of RMB to USD is 683.49 and 685.05 respectively", but the price of USD to RMB is 683.49 and 685.05 respectively.