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BUSINESS ACQUISITION AND INVESTMENT IN UNCONSOLIDATED ENTITY - Fair value of identified intangible assets, customer relationship and its estimated useful lives (Details) - 6 months ended Dec. 31, 2021 - Future Gas Station (Beijing) Technology, Ltd | CNY (¥) | USD ($)
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Acquired Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets - customer relationship | ¥ 7,000,000 | $ 1,100,383
Less: accumulated amortization | (700,000) | (110,038)
Total intangible assets, net as of June 30,2021 | ¥ 6,300,000 | $ 990,345
Average Useful Life (in Years) | 10 years |

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