Is it illegal to pull a banner at a hotel wedding banquet in violation of the contract?

Illegal. Article 2 of the "Public Security Management Punishment Law": disrupting public order, impeding public safety, infringing upon personal rights and property rights, impeding social management, and having social harm, according to the "People's Republic of China and the Criminal Law of the People's Republic of China" "If the crime constitutes a crime according to the provisions of this Law, criminal responsibility shall be investigated in accordance with the law;

If it is not enough for criminal punishment, the public security organs shall impose public security management penalties in accordance with this law. Hanging a banner in a hotel that disrupts public order will be considered an illegal act. A wedding party refers to a banquet held to celebrate a marriage. In China, a wedding banquet is usually called a wedding banquet.