Right-of-use assets and lease liabilities - Maturity of undiscounted cash flows of lease liabilities (Details) |
Jun. 30, 2026
CNY (¥)
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Jun. 30, 2026
USD ($)
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| Maturity analysis of the annual undiscounted cash flows for the lease liabilities | ||
| 2027 | ¥ 590,405 | $ 87,015 |
| 2028 | 411,663 | 60,672 |
| 2029 | 185,096 | 27,280 |
| 2030 | 194,347 | 28,643 |
| 2031 | 99,547 | 14,671 |
| Total undiscounted lease payments | 1,481,058 | 218,281 |
| Less: Imputed interest | (75,758) | (11,166) |
| Lease liabilities recognized in the Consolidated Balance Sheet | ¥ 1,405,300 | $ 207,115 |
| Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration] | Operating Lease, Liability, Current, Operating Lease, Liability, Noncurrent | Operating Lease, Liability, Current, Operating Lease, Liability, Noncurrent |
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- Definition Amount of lessee's undiscounted obligation for lease payment for operating lease. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for operating lease. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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- Definition Present value of lessee's discounted obligation for lease payments from operating lease. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Indicates line item in statement of financial position that includes operating lease liability. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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