Not reliable. Some institutions have no moral integrity. Pay special attention to those who take the initiative to call. Everyone should consult more. It is best to ask more people in the industry. Long-term development must be considered when changing careers. Big data is not reliable. No matter which industry you want to make money in, you should be familiar with it and find out its routines, rules and ways to make money. Otherwise, it is easy to become cannon fodder, so it is actually the most difficult to enter any industry.