no params provide sorting info of data. I have to sort data manually before appling them to the bar chart

So you want to change items colors, instead of preserving them as in official example ?
Please make an effort to create Minimal Reproduction code.

@helgasoft ，I make some changes to the example:

yAxis: {
      type: 'category',
      inverse: true,
      max: 10,
      axisLabel: {
        show: true,
        fontSize: 14,
        formatter: function (value, idx, sortIdx) {
          const flag = sortIdx === 0 ? 'first' : sortIdx === 1 ? 'second' : 'normal';
          return '{' + flag  + '|' + value + '}' + '{flag|' + getFlag(value) + '}';
        },
        rich: {
          first: {
            color: '#ffd700'
          },
          second: {
            color: 'c0c0c0',
          },
          normal: {},
          flag: {
            fontSize: 25,
            padding: 5
          }
        }
      },
      animationDuration: 300,
      animationDurationUpdate: 300
    },

This always set specific color for the first and the second.

This always set specific color for the first and the second.

cannot replicate, sortIdx is null, I still do not understand what you are trying to accomplish

@helgasoft I want echarts to implement sortIdx which give me the current sorting info data in realtimeSort: true .
For the official demo, in my case, the first and the second city should be always using gold and silver color. Other cities keeping using their colors.