(In this column, Luo Yonghao, the founder of Smartisan Technology, systematically restores the real picture of entrepreneurship for you, and teaches you to solve the problems that entrepreneurs must face step by step. For more than 5 years of success/failure/challenge, Lao Luo confessed without reservation, restoring the true response of an entrepreneur. The column provides solutions to the following specific business problems, each of which is pure dry goods that can be used immediately.)