Other Non-Current Assets (Tables)

12 Months Ended

Dec. 31, 2024

Other Non-current Assets

Schedule of long-term time deposits and held-to-maturity debt securities by contractual maturity date


		As of December 31,
		2023		2024		2024
		RMB		RMB		US$

Due in 1 year through 2 years		11,510,069		40,641,146		5,567,814
Due in 2 years through 3 years		17,274,928		16,668,409		2,283,563
		28,784,997		57,309,555		7,851,377

Schedule of contractual maturity date of the investments


		As of December 31, 2023
				Gross		Gross		Fair Value
		Amortized		Unrealized		Unrealized		(Net Carrying
		Cost		Gains		Losses		Amount)
		RMB		RMB		RMB		RMB

Due in 1 year through 5 years		14,140,990		43,561		—		14,184,551
Due in 5 years through 10 years		2,608,225		29,958		(6,357)		2,631,826
		16,749,215		73,519		(6,357)		16,816,377


		As of December 31, 2024
								Fair Value		Fair Value
				Gross		Gross		(Net		(Net
		Amortized		Unrealized		Unrealized		Carrying		Carrying
		Cost		Gains		Losses		Amount)		Amount)
		RMB		RMB		RMB		RMB		US$

Due in 1 year through 5 years		20,635,590		396,362		—		21,031,952		2,881,366
Due in 5 years through 10 years		2,607,675		215,569		—		2,823,244		386,782
		23,243,265		611,931		—		23,855,196		3,268,148