They are in other places or abroad. Because one party is in a foreign country or abroad, it is unable to attend the trial in person and appear online. In this case, the court will contact him by video conference to ensure his right to participate in the trial. The other party chooses to appear in court on the spot because it is local or convenient to appear in person. Whether online or on site, the parties should strictly abide by the rules and requirements of the court to ensure the smooth progress of the trial. At the same time, for the parties who appear in court online, they also need to pay attention to the stability of network connection and the preparation of equipment to avoid technical failure or inability to connect.