Rolling in the stock market, you must have had these thoughts:I only get a salary of more than 30,000 yuan a month, so I really want to increase my income by investing?Financial news is too many and complex, can’t understand and digest?Investing in the stock market for many years, but always buying at the highs and selling at the lows?10 years of full-time investor career, the most essential stock selection logic extracted by Lao Wang