(Summarize a set of scientific methods. If you are alone or have a limited team, you can only focus on the business field, leaving behind a series of industries such as finance, sports, mother and baby, tourism, emotion, health, workplace, etc., I can't do it. Time, it is impossible to understand the professional knowledge of so many industries. But the approach works in those industries. Choose an industry, find the right position, show your expertise to users, and then make a deal. This approach can be applied to almost any industry.)
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