It is not a one-way price increase or price reduction, but that the domestic price is lower than that of foreign countries, and the high price is lower.
For example, in China, each apple costs 1 yuan (RMB), and in the United States, each apple costs 1 yuan (USD).
If the exchange rate is 1: 1, the price of apples in both countries will not change.
If the exchange rate is 6: 1, the result will be different. Americans will buy apples from China, and China will increase production and occupy more cultivated land, so the cost of cultivated land will go up, the cost of apples will go up, and the price will go up. On the other hand, if no one buys American apples, the price will drop. The new price balance may be located in China, where each apple rises to 3 yuan (RMB), while in the United States, each apple falls to 0.5 yuan (USD).
A simple example, but it involves many factors, and the cause of the price is very complicated. This is definitely not a question of shouting slogans.