First of all, blocking the pound is a long-term process, an all-round battle of three-dimensional operations by land, sea and air, not a simple short sale. First, the most essential reason is that the domestic real economy was not good at that time. After joining the euro zone, the pound has been depreciating against the euro. For EU member countries, Britain must abide by the exchange rate peg agreement between the pound and the euro, that is, the lower limit of the dollar against the pound is 1.6 euro (possibly other data). At this time, the British stock market, real estate and other financial assets flourished (like China now), and the domestic asset bubble was obvious. Although the British government used foreign exchange reserves to intervene in the exchange rate in order to comply with the EU agreement, it barely maintained the lower limit; Secondly, when talking about Soros, Soros already knew that the European Union, represented by Germany, would not help Britain stabilize the exchange rate because of the poor domestic economy, so he led many funds to short the British financial market and hedge the European financial market, while shorting the spot and futures of the pound.

As for Hong Kong, it is because the mainland has issued an official statement to use hundreds of billions of foreign exchange reserves to support Hong Kong's economy.