Meta CEO Mark Zuckerberg is scheduled to testify in the Los Angeles Superior Court on Wednesday, as part of a trial centered around allegations of social media addiction. The case, initiated in late January, features a young woman as the lead plaintiff, who claims she became addicted to social media and video streaming apps like Instagram and YouTube during her childhood, leading to deteriorating mental health, including depression, anxiety, and suicidal tendencies. The plaintiff accuses Meta and YouTube of intentionally designing addictive products that exploit vulnerabilities in children's brains to create addiction, and demands that the platforms be held accountable for the deterioration of her mental health. Meta has denied the allegations, arguing that the causes of the plaintiff's mental health issues are complex and not directly linked to social media use. The trial is expected to last 6 to 8 weeks, with Zuckerberg and several other tech leaders set to testify. The verdict will provide a reference for subsequent similar cases and may impact the long-standing legal liability exemption system in the U.S. internet industry.