v3.26.1
PARENT COMPANY ONLY CONDENSED FINANCIAL INFORMATION - Condensed Statements of Cash Flows (Details)
 12 Months Ended
Dec. 31, 2025
CNY (¥)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
CNY (¥)
Dec. 31, 2023
CNY (¥)
Condensed Statements of Cash Flows        
Net cash provided by (used in) operating activities ¥ 353,270,015 $ 50,516,940 ¥ 52,286,618 ¥ 93,735,092
Net cash provided by (used in) investing activities (90,600,683) (12,955,725) (292,428,847) 216,310,708
Net cash provided by financing activities 40,164,587 5,743,460 100,267,335 (59,345,977)
Effect of foreign currency exchange rate changes on cash, cash equivalents and restricted cash (13,648,886) (1,951,765) 6,051,800 8,913,200
Net increase (decrease) in cash, cash equivalents and restricted cash 289,185,033 41,352,910 (133,823,094) 259,613,023
Cash, cash equivalents and restricted cash at the beginning of the year 846,417,099 121,036,035 980,240,193 720,627,170
Cash, cash equivalents and restricted cash at the end of the year 1,135,602,132 $ 162,388,945 846,417,099 980,240,193
Reportable Legal Entities | Parent        
Condensed Statements of Cash Flows        
Net cash provided by (used in) operating activities 1,448,176   (177,106) 14,392,402
Net cash provided by (used in) investing activities 7,644,080   (89,689,320) 133,818,900
Net cash provided by financing activities 164,587   267,335 654,023
Effect of foreign currency exchange rate changes on cash, cash equivalents and restricted cash (5,835,177)   4,212,517 4,034,789
Net increase (decrease) in cash, cash equivalents and restricted cash 3,421,666   (85,386,574) 152,900,114
Cash, cash equivalents and restricted cash at the beginning of the year 256,093,814   341,480,388 188,580,274
Cash, cash equivalents and restricted cash at the end of the year ¥ 259,515,480   ¥ 256,093,814 ¥ 341,480,388