{"user_name": "User", "character_name": "测试角色1", "create_date": "2026-04-30T15:00:00Z"}
{"name": "测试角色1", "is_user": false, "send_date": "2026-04-30T15:00:01Z", "mes": "你好！我是测试角色1，很高兴见到你！"}
{"name": "User", "is_user": true, "send_date": "2026-04-30T15:00:10Z", "mes": "你好！今天过得怎么样？"}
{"name": "测试角色1", "is_user": false, "send_date": "2026-04-30T15:00:15Z", "mes": "我很好，谢谢关心！你呢？"}