First, there are many kinds of barbecues, but you can't eat more, which also restricts the development of the barbecue industry. Second, there are great health problems in barbecue shops. Third, the season is limited, and there is an obvious off-peak season. But now with the popularity of barbecue, the off-peak season has become less and less obvious. Other problems can be overcome. If you only open one or two, the problem is not big, but if it is a brand or a chain, the threshold is still very high.