The purchasing power you mentioned is generally understood as the consumption power of daily necessities, which can be measured by consumption index, which is also the common CIP in statements.

The appreciation of RMB has no direct impact on us personally, if we don't conduct foreign exchange transactions or have foreign exchange receipts and payments. The appreciation of RMB will affect the export of China products, as well as those enterprises that rely on export for profit, but it has no direct impact on individuals.

The appreciation of RMB has a wide range of influences, such as the influence on domestic export enterprises, the influence on individuals and enterprises engaged in foreign exchange trading or buying foreign exchange futures and options, the influence on the flow of foreign funds in China market, the influence on domestic interest rates, the influence on the China government's regulation of money supply and demand, and the influence on the use of China's foreign exchange reserves.

There are many reasons for the change of CIP index, such as the number of RMB issued, inflation rate, people's wage level, interest rate, etc., which will affect purchasing power.