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So as long as the stock price in your hand is not lower than the third line, don't sell it. Basically, after a bull market, you can never sell it. If you can't resist the temptation, buy and sell. That's hard to say.3. Investment is to make life happier and happier. If investment makes you unhappy at all, please leave this market immediately regardless of profit or loss!The pressure level is around 2300;

Science and technology-new quality generation, new energy, military industry, special evaluation, big finance, medicine and medical care, should be good.The strong pressure is around 2350;The strong pressure is around 2350;

Science and technology-new quality generation, new energy, military industry, special evaluation, big finance, medicine and medical care, should be good.The pressure level is around 2300;It is expected to open low and go high, bottom out and rebound, and the bulls will stand firm at 3500 points.