After being sued by Dida Insurance Company, the defendant should take the initiative to sign various documents sent by the court, keep abreast of the court's trial schedule, know who is suing and the specific content of the lawsuit, and submit a defense within 15 days after receiving the copy of the complaint according to the content.

Defendants can also use legal weapons to safeguard their legitimate rights and interests and actively respond to lawsuits in accordance with court instructions and relevant laws and regulations.

Litigation is a kind of judicial activity, which refers to the activities of the people's court to try and solve criminal, civil and administrative cases according to law with the participation of the parties and all litigation participants, and the litigation relationship arising from these activities. According to the different contents and forms of litigation, it can be divided into criminal litigation, civil litigation and administrative litigation.