Feature/embedding global variable

[charleschile]

What type of PR is this?

• API-change
• BUG
• Improvement
• Documentation
• Feature
• Test and CI
• Code Refactoring

Which issue(s) this PR fixes:

issue #

What this PR does / why we need it:

[CLAassistant]

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2 out of 3 committers have signed the CLA.

✅ charleschile
✅ peterluvCS
❌ zizicc
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