As a fan, I think Mayday, as a well-known orchestra, should take honesty and professionalism as the criterion to present the most authentic performance for the audience. If they really don't lip-synch, they should bravely stand up and defend themselves. But if they do lip-synch, it is extremely disrespectful to the audience and is also suspected of consumer fraud.
Xu Hao, a lawyer of Beijing Shi Jing Law Firm, said that if the singer lip-synching at the concert is illegal and this behavior is suspected of consumer fraud, the audience can ask the organizer to "refund one and compensate three". Once identified as lip-synching, the singers involved may face different degrees of industry boycott, and if the circumstances are serious, they may be banned for life.
As an idolater, I think this is a very serious accusation. If there is really no lip-synching on May Day, then they should actively cooperate with the investigation and speak with facts. But if they really lip-synch, then they should bear the corresponding legal responsibility. At the same time, I hope that the official institutions can find out the truth as soon as possible and give the audience an explanation.
To sum up, I want to say that as his younger brother, I will always support Mayday. But I also hope that they can take honesty and professionalism as the criterion and present the most authentic performance for the audience. Only in this way can we win the support and love of more audiences.