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Exhibit 8.1

List of Principal Subsidiaries of Hesai Group

Subsidiaries

Place of Incorporation

Hesai Hong Kong Limited

Hong Kong

Hesai Technology Co., Ltd.

People’s Republic of China

Shanghai Hesai Trade Co. Ltd.

People’s Republic of China

Hertz Technology Co., Ltd.

People’s Republic of China

HESAI INC.

United States

Oxigraf, Inc.

United States