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Exhibit 8.1

List of Principal Subsidiaries of Hesai Group

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Subsidiaries

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Place of Incorporation

Hesai Hong Kong Limited

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Hong Kong

Hesai Technology Co., Ltd.

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People’s Republic of China

Shanghai Hesai Trade Co. Ltd.

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People’s Republic of China

Hertz Technology Co., Ltd.

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People’s Republic of China

HESAI INC.

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United States

Oxigraf, Inc.

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United States

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