For foreign investors, China is a huge pig farm. The so-called pig is the savings of residents. Foreign investors can usually bargain-hunt when the stock market is depressed, and then wait for residents' savings to increase (pigs become fat) and monetary policy to cut interest rates, so that savings will flow to the stock market, thus raising the stock market (China stock market is easier to raise, because there are few rational investors, and everyone will flock to it). When the stock market reaches a certain level, foreign investors will begin to retreat, resulting in a large number of China speculators.