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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Selling and Marketing Expenses, Government Grants, Employee Benefits (Details) - CNY (¥)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Advertising expenses	¥ 177,824,898	¥ 191,776,905	¥ 160,415,978
Government grants	2,968,735	16,385,038	48,726,818
Employee social benefits included as expenses	¥ 42,376,447	¥ 42,637,403	¥ 31,122,424

X

- Definition

The amount of subsidies received by the entity from the government under terms of a grant program.

+ References

No definition available.

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- References

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- Definition

Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 720
-SubTopic 35
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848

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- Definition

Amount of cost for defined contribution plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 70
-Section 50
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942

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