Bank settlement means that an enterprise sells its foreign exchange income to a designated foreign exchange bank at the current exchange rate, and the bank collects foreign exchange and converts it into RMB for the enterprise. Since the founding of New China, the foreign exchange settlement system has been implemented.

However, the current foreign exchange settlement system has two characteristics:

First, at the same time of settlement of foreign exchange, the retention and settlement of foreign exchange were cancelled, and the management of foreign exchange quota was cancelled; Second, the designated foreign exchange banks handle foreign exchange settlement instead of the central bank, and the local currency funds needed for foreign exchange settlement are solved by the designated foreign exchange banks themselves, and the central bank no longer provides them.

Bank sale of foreign exchange: the act of designated foreign exchange banks selling foreign exchange to foreign exchange users and collecting the equivalent RMB at the RMB exchange rate on the transaction date.

Flat refers to the fact that the current price of a stock is the same as the closing price of the previous trading day. For example, the opening price is the same as yesterday's closing price, which is called Kaiping; The closing price of the day is equal to the closing price of the previous day. After banks collect a certain amount of foreign exchange from individual customers, they transfer the risk to the international foreign exchange market, which is called "flat trading". The problem at this level has nothing to do with whether domestic investors are QDII, and will not cause personal foreign exchange risks.