admin_backend/template/card_vchart_area.tmpl

{
    "tag": "chart",
    "chart_spec": {
        "type": "area",
        "title": {
        "text": "活跃度"
        },
        "data": {
            "values": [{{.Values}}]
        },
        "xField": "time",
        "yField": "value"
    }
}