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Short-term investments (Tables)

12 Months Ended

Dec. 31, 2024

Short-term investments

Schedule of short-term Investments

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​	​	​	​	​	​	​
​	​	As of December 31,
​		2023		2024
​	​	RMB	​	RMB		US$
Debt securities:	​	​	​	​
Wealth management products issued by banks or security/trust companies		350,164,305		178,821,757		24,498,480
Equity securities:		​		​		​
Marketable equity securities		292,729,235		939,725,698		128,741,893
Short-term investments		642,893,540		1,118,547,455		153,240,373

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The tabular disclosure of short-term investments.

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