Do you think it's feasible to do a business venture that focuses on hair washing business?

Feasible, as long as you grasp the market demand points and pain points, not a big problem. As long as the business has market pain points and demand points, then there is a chance of success. Hair washing business is also very market, especially in the community of college students and the community of this piece of the community, if you can grasp the lazy wash this pain point is still feasible, such as providing door-to-door hair washing services, to solve the last few meters of the distance of the hair washing, or a very good chance.