Bootstrapping tutorials in documentation (#4522)

docs/zh_CN/TrainingService/LocalMode.rst

-../../en_US/TrainingService/LocalMode.rst
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docs/zh_CN/TrainingService/Overview.rst

-../../en_US/TrainingService/Overview.rst
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docs/zh_CN/TrainingService/PaiMode.rst

-../../en_US/TrainingService/PaiMode.rst
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docs/zh_CN/TrainingService/RemoteMachineMode.rst

-../../en_US/TrainingService/RemoteMachineMode.rst
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docs/zh_CN/TrialExample/Cifar10Examples.rst

-../../en_US/TrialExample/Cifar10Examples.rst
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docs/zh_CN/TrialExample/EfficientNet.rst

-../../en_US/TrialExample/EfficientNet.rst
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docs/zh_CN/TrialExample/GbdtExample.rst

-../../en_US/TrialExample/GbdtExample.rst
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docs/zh_CN/TrialExample/KDExample.rst

-../../en_US/TrialExample/KDExample.rst
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docs/zh_CN/TrialExample/MnistExamples.rst

-../../en_US/TrialExample/MnistExamples.rst
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docs/zh_CN/TrialExample/OpEvoExamples.rst

-../../en_US/TrialExample/OpEvoExamples.rst
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docs/zh_CN/TrialExample/Pix2pixExample.rst

-../../en_US/TrialExample/Pix2pixExample.rst
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docs/zh_CN/TrialExample/RocksdbExamples.rst

-../../en_US/TrialExample/RocksdbExamples.rst
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docs/zh_CN/TrialExample/SklearnExamples.rst

-../../en_US/TrialExample/SklearnExamples.rst
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docs/zh_CN/TrialExample/SquadEvolutionExamples.rst

-../../en_US/TrialExample/SquadEvolutionExamples.rst
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docs/zh_CN/Tuner/AnnealTuner.rst

-../../en_US/Tuner/AnnealTuner.rst
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docs/zh_CN/Tuner/BatchTuner.rst

-../../en_US/Tuner/BatchTuner.rst
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docs/zh_CN/Tuner/BohbAdvisor.rst

-../../en_US/Tuner/BohbAdvisor.rst
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docs/zh_CN/Tuner/BuiltinTuner.rst

-../../en_US/Tuner/BuiltinTuner.rst
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docs/zh_CN/Tuner/CustomizeAdvisor.rst

-../../en_US/Tuner/CustomizeAdvisor.rst
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docs/zh_CN/Tuner/CustomizeTuner.rst

-../../en_US/Tuner/CustomizeTuner.rst
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