Niu Technologies Announces Fourth Quarter and Full Year 2021 Financial ResultsGlobeNewsWire • 03/07/22
Niu Technologies to Release Fourth Quarter and Full Year 2021 Results on March 7, 2022GlobeNewsWire • 02/08/22
Niu Technologies (NIU) CEO Yan Li on Q3 2021 Results - Earnings Call TranscriptSeeking Alpha • 11/22/21
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Niu Technologies (NIU) CEO Yan Li on Q2 2021 Results - Earnings Call TranscriptSeeking Alpha • 08/16/21