​

​

As of December 31, 

​

​

2024

​

2025

​

  ​ ​ ​

RMB

  ​ ​ ​

RMB

  ​ ​ ​

US$

Construction in progress

​

1,302,148,272

​

—

​

—

Leasehold improvements

15,967,920

​

13,615,929

​

1,947,052

Office and electronic equipment

11,704,829

​

9,951,202

​

1,423,003

Motor vehicles

13,402,055

​

10,553,180

​

1,509,085

Aircraft

​

180,292,710

​

172,729,570

​

24,700,000

Buildings

​

118,266,537

​

1,570,548,470

​

224,585,444

Property and equipment, gross

1,641,782,323

​

1,777,398,351

​

254,164,584

Less accumulated depreciation

54,915,306

​

98,571,734

​

14,095,570

Less impairment

833,390

​

833,390

​

119,174

Property and equipment, net

1,586,033,627

​

1,677,993,227

​

239,949,840