Is it illegal to not pull up banners if you owe money?

Legal analysis: Debt collection should be carried out in accordance with the law and no drastic actions should be taken. As long as it does not disrupt the working order of the company or the order of public places, it is not illegal to hang banners and slogans at the door of the company that owes debts.

Gathering a crowd to cause trouble is called "the crime of gathering a crowd to disrupt social order" in the criminal law.

Legal basis: "Criminal Law of the People's Republic of China" Article 290, Paragraph 1: Gathering a crowd to disrupt social order, if the circumstances are serious, making it impossible to carry out work, production, business, teaching, and scientific research. If serious losses are caused, the ringleaders shall be sentenced to fixed-term imprisonment of not less than three years but not more than seven years; other active participants shall be sentenced to fixed-term imprisonment of not more than three years, criminal detention, surveillance, or deprivation of political rights.