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At least 3 days prior to cutting the first release candidate, bump up the version number and address other changes that the release depends on.

Bump up the version number by following into v1.x branch if the new version is branched off from v1.x. Bump up the version number into master branch if the new version is branched off from master. Here is a previous version update PR (https://github.com/apache/incubator-mxnet/pull/1347819196). Please update this wiki with latest version update PR to stay current.
make sure no broken/non-existing links are added to the master branch. 

Check with the website lead and docs lead that all necessary updates have made it into the release branch

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