There are two factors in currency appreciation. One is the adjustment of the gold content of the currency by the central bank of China, and the other is the demand for the currency in the international market. At present, the appreciation of RMB is largely influenced by the international market, which is due to the stable position of RMB and the comprehensive strength of China.
We know that China's current national condition is deflation, so we need to expand domestic demand. The appreciation of RMB means higher raw material and labor costs and relatively lower profits, which will weaken China's attraction to foreign investment. The competitiveness of the international labor market has decreased, and the danger of deflation has intensified. In the long run, it will lead to inflation caused by export tension. Therefore, the best state of a currency is a stable exchange rate, or at least a steady progress.
For your question, let's assume that China is currently in a period of inflation, and the appreciation of RMB is of special positive significance.
In the period of inflation, currency depreciation will inevitably occur, and at this time, RMB appreciation can effectively curb inflation, stabilize social order and restore normal production of the country. This is also one of the reasons why World War II broke out after the 1939 economic crisis. Germany, Italy, Japan and other fascist countries launched wars against other countries in order to divert the domestic economic crisis, from which they gained a lot of wealth and made their currencies appreciate.