Brief Information

This pull request is in the type of:

• [ ] bug fixing
• [ ] new feature
• [ ] others

What does this PR do?

Fixed issues

Details

Before: What was the problem?

After: How is it fixed in this PR?

Misc

• [ ] The API has been changed (apache/echarts-doc#xxx).
• [ ] This PR depends on ZRender changes (ecomfe/zrender#xxx).

Related test cases or examples to use the new APIs

NA.

Others

Merging options

• [ ] Please squash the commits into a single one when merge.

Other information