如何在amchart XY图表上显示精确的数值轴，而不会自动舍入小数？

// 创建XY图表对象
var chart = am4core.create("chartdiv", am4charts.XYChart);

// 设置数值轴类型
var valueAxis = chart.yAxes.push(new am4charts.ValueAxis());

// 设置数值轴精度
valueAxis.numberFormatter = new am4core.NumberFormatter();
valueAxis.numberFormatter.numberFormat = "#,###.##"; // 设置为两位小数

// 设置数据源
chart.data = [{
  "category": "A",
  "value": 123.456
}, {
  "category": "B",
  "value": 789.012
}, {
  "category": "C",
  "value": 345.678
}];

// 渲染图表
chart.exporting.menu = new am4core.ExportMenu();
chart.exporting.menu.align = "right";
chart.exporting.menu.verticalAlign = "top";

// 添加柱状图系列
var series = chart.series.push(new am4charts.ColumnSeries());
series.dataFields.valueY = "value";
series.dataFields.categoryX = "category";

// 添加数值标签
var labelBullet = series.bullets.push(new am4charts.LabelBullet());
labelBullet.label.text = "{valueY}";
labelBullet.label.verticalCenter = "bottom";
labelBullet.label.dy = -10;

// 添加柱状图动画
chart.events.on("ready", function() {
  series.columns.each(function(column) {
    column.animate({ property: "y", to: column.y, from: series.yAxis.zeroPoint }, 1000, am4core.ease.outQuint);
  });
});