OK. Do you need access to the canvas object, or touch event? For canvas object, it can be accessed by [chart.getDom](https://ecomfe.github.io/echarts-doc/public/en/api.html#echartsInstance.getDom). It returns the container of the chart, so it may be `<canvas>` or `<div>` depending on init. If it is the later one, you may call `getElementsByTagName` on the result. For touch event, what interface do you need exactly?
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