Ma Gang, senior analyst of Qilu Securities Research Institute, 15 securities research and investment experience, has worked in securities media, investment consulting companies, professional investment institutions and securities companies. Under the pseudonym of "People in the Past", he published hundreds of Wan Yu articles on finance and securities in more than a dozen national securities newspapers and periodicals such as china securities journal, shanghai securities news and Securities Times, participated in the compilation of securities monographs such as The Complete Book of Stock Market Operation, and participated in the planning of various books. All-in-one fund is the author's latest monograph. The author has a unique perspective, keen market sense and rich investment experience on the securities market and financial investment.