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CRYPTOCURRENCIES Summary of intangible assets (Details)	Dec. 31, 2022 CNY (¥)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)
CRYPTOCURRENCIES
Intangible assets - cryptocurrencies	¥ 66,341,653	$ 9,618,636	¥ 86,118,349	$ 13,513,848
Bitcoins
CRYPTOCURRENCIES
Intangible assets - cryptocurrencies	60,576,929	8,782,829	77,693,877
Tether
CRYPTOCURRENCIES
Intangible assets - cryptocurrencies	29,318	4,251	¥ 8,424,472
Ethereum
CRYPTOCURRENCIES
Intangible assets - cryptocurrencies	4,924,572	713,996
Filecoin
CRYPTOCURRENCIES
Intangible assets - cryptocurrencies	808,711	117,252
Binance Coin
CRYPTOCURRENCIES
Intangible assets - cryptocurrencies	¥ 2,123	$ 308

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- Definition

The current portion of nonphysical assets, excluding financial assets, if these assets are classified into the current and noncurrent portions.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 45
-Paragraph 10
-URI https://asc.fasb.org/extlink&oid=109222160&loc=d3e1107-107759

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