<!-- Please fill in the following information to help us review your PR more efficiently. -->

## Brief Information

This pull request is in the type of:

- [ ] bug fixing
- [ ] new feature
- [ ] others



### What does this PR do?

<!-- USE ONCE SENTENCE TO DESCRIBE WHAT THIS PR DOES. -->



### Fixed issues

<!--
- #xxxx: ...
-->


## Details

### Before: What was the problem?

<!-- DESCRIBE THE BUG OR REQUIREMENT HERE. -->

<!-- ADD SCREENSHOT HERE IF APPLICABLE. -->



### After: How is it fixed in this PR?

<!-- THE RESULT AFTER FIXING AND A SIMPLE EXPLANATION ABOUT HOW IT IS FIXED. -->

<!-- ADD SCREENSHOT HERE IF APPLICABLE. -->



## Misc

<!-- ADD RELATED ISSUE ID WHEN APPLICABLE -->

- [ ] 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
