Emphasis the importance of input of unsafe recovery

[qiancai]

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• This PR is translated from: Emphasis the importance of input of unsafe recovery docs-cn#18628
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[qiancai]

/cc @v01dstar

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[v01dstar]

lgtm

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[qiancai]

/approve

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[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-8.5: #19601.