the util to combine message
Revert "the util to combine message"

This reverts commit 6d4e8c5072a32aa23d00ec9d79aa748a253e9ef0.
Revert "Revert "the util to combine message""

This reverts commit 91537f48ebd3af6e5d74f14be8bcf12b225f7c81.
Merge https://github.com/anphoenix/demo_nlp_im