Legal analysis: After being sued, the court will serve a summons to the defendant. Once you receive the summons, you will know that you have been sued. A court summons is a written document issued by the people's court in accordance with the law, requiring the person being summoned to appear in court at a designated place at a designated time to participate in litigation activities or conduct other litigation activities.

Legal basis: Article 125 of the "Civil Procedure Law of the People's Republic of China" The people's court shall send a copy of the complaint to the defendant within five days from the date of filing the case, and the defendant shall File a defense within fifteen days from the date of arrival. The defense statement shall state the name, gender, age, ethnicity, occupation, workplace, residence, and contact information of the defendant; the name, residence, and name, position, and contact information of the legal person or other organization and the legal representative or principal person in charge. The People's Court shall send a copy of the defense to the plaintiff within five days from the date of receipt of the defense. If the defendant fails to submit a statement of defense, it will not affect the trial of the People's Court.