**Highlights**
- Support ViT, SETR, and Swin-Transformer
- Add Chinese documentation
- Unified parameter initialization
**Bug Fixes**
- Fix typo and links ([608](https://github.com/open-mmlab/mmsegmentation/pull/608))
- Fix Dockerfile ([607](https://github.com/open-mmlab/mmsegmentation/pull/607))
- Fix ViT init ([609](https://github.com/open-mmlab/mmsegmentation/pull/609))
- Fix mmcv version compatible table ([658](https://github.com/open-mmlab/mmsegmentation/pull/658))
- Fix model links of DMNet and UNet ([660](https://github.com/open-mmlab/mmsegmentation/pull/660))
**New Features**
- Support loading DeiT weights ([538](https://github.com/open-mmlab/mmsegmentation/pull/538))
- Support SETR ([531](https://github.com/open-mmlab/mmsegmentation/pull/531), [#635](https://github.com/open-mmlab/mmsegmentation/pull/635))
- Add config and models for ViT backbone with UperHead ([520](https://github.com/open-mmlab/mmsegmentation/pull/531), [#635](https://github.com/open-mmlab/mmsegmentation/pull/520))
- Support Swin-Transformer ([511](https://github.com/open-mmlab/mmsegmentation/pull/511))
- Add higher accuracy FastSCNN ([606](https://github.com/open-mmlab/mmsegmentation/pull/606))
- Add Chinese documentation ([666](https://github.com/open-mmlab/mmsegmentation/pull/666))
**Improvements**
- Unified parameter initialization ([567](https://github.com/open-mmlab/mmsegmentation/pull/567))
- Separate CUDA and CPU in github action CI ([602](https://github.com/open-mmlab/mmsegmentation/pull/602))
- Support persistent dataloader worker ([646](https://github.com/open-mmlab/mmsegmentation/pull/646))
- Update meta file fields ([661](https://github.com/open-mmlab/mmsegmentation/pull/661), [#664](https://github.com/open-mmlab/mmsegmentation/pull/664))