Years Ended December 31,

2023

2024

2025

RMB

USD

Numerator:

Net income used in calculating earnings per share-basic and diluted

269,316,308

110,002,230

166,792,024

23,850,941

Denominator:

Weighted average number of Class A ordinary shares outstanding used in calculating basic and diluted earnings per share

67,321,003

66,776,243

66,366,641

Weighted average number of Class B ordinary shares outstanding used in calculating basic and diluted earnings per share

34,762,909

Allocation of undistributed earnings — basic and diluted:

To Class A Shares

177,605,302

72,341,905

109,457,882

15,652,269

To Class B Shares

91,711,006

37,660,325

57,334,142

8,198,673

Basic and diluted earnings per share:

To Class A Shares

2.64

1.08

1.65

0.24

To Class B Shares

2.64

1.08

1.65

0.24