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Exhibit 8.1

List of Principal Subsidiaries and Consolidated Variable Interest Entity

Subsidiary

  ​ ​ ​

Place of Incorporation

HongKong Walnut Street Limited

Hong Kong

Hangzhou Weimi Network Technology Co., Ltd.

The Chinese Mainland

Shenzhen Qianhai Xinzhijiang Information Technology Co., Ltd.

The Chinese Mainland

Radiance Sea Investment Limited

British Virgin Islands

Radiance Sea Group Limited

Cayman Islands

Radiance Sea Hong Kong Limited

Hong Kong

Pinduoduo Investment Limited*

British Virgin Islands

Pinduoduo (Shanghai) Network Technology Co.,Ltd.

The Chinese Mainland

Shanghai Yucan Information Technology Co., Ltd.

The Chinese Mainland

Elementary Technology Limited

British Virgin Islands

Elementary Innovation Pte. Ltd.

Singapore

Whaleco Technology Limited

Ireland

Whaleco Inc.

Delaware

Consolidated Variable Interest Entity

Place of Incorporation

Hangzhou Aimi Network Technology Co., Ltd.

The Chinese Mainland

Subsidiary of Consolidated Variable Interest Entity

Place of Incorporation

Shanghai Xunmeng Information Technology Co., Ltd.

The Chinese Mainland

* Pinduoduo Investment Limited is the immediate parent company of 9 wholly owned subsidiaries, whose names have been omitted in reliance on Instruction 8 of the exhibit requirements set forth in Form 20-F. Pinduoduo Investment Limited and its subsidiaries are engaged in investment activities outside the United States.