### What problem does this PR solve? refactor stepfun cv model ### Type of change - [x] Refactoring Co-authored-by: Zhedong Cen <cenzhedong2@126.com>
### What problem does this PR solve? refactor stepfun cv model ### Type of change - [x] Refactoring Co-authored-by: Zhedong Cen <cenzhedong2@126.com>