First, why do old people do this? So first of all, I think why old people do this is because they do it for their own health. In order to prolong life, maybe they will do it for exercise, and then they will do it. Because if they go to the square dance, it may be because they disturb the people. In addition, they may not find a good way to coach during the exercise, so I think their behavior itself is like that. For such behavior, I think we should look at the problem rationally.
Second, what are the disadvantages of doing so? Then I think the disadvantage of doing so is that it really takes up the public resource of bicycles. Because he likes riding a bike, it is geared to the needs of the whole society, so for some people, he urgently needs this bike. But if there are some idle bicycles there, I don't think they should do so either. If you want to exercise, you can ride a bike, but you can't use it as sports equipment, so I think it's hurting the public. And we also reject such things very much.