Meaning of "on a hot streak"

English as a Second Language English Vocabulary, Grammar and Idioms
1

This phrase is often used outside the sports or gambling topics. What is its exact meaning as in following examples:

China [color=red]on a hot streak with larger scale, new mills.

Big business [color=red]on a hot streak with governor - Schwarzenegger vetoes 12 of 12 proposals

2

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Developing/operating very successfully at the moment.
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3

Thank you, Mister Micawber