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Prepayment and other current assets (Details) ¥ in Thousands, $ in Thousands	Dec. 31, 2018 CNY (¥)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 CNY (¥)
Prepaid Expense and Other Assets, Current [Abstract]
Receivables due from dealerships	¥ 10,661		¥ 0
Deductible VAT	4,852		5,902
Deposits	8,637		1,814
Prepaid rental expenses	2,168		1,421
Receivables due from third-party online payment platforms	469		1,482
Staff advances	695		1,875
Prepaid promotion expenses	36,538		3,199
Prepaid service fees	2,574		178
Others	2,225		310
Total	¥ 68,819	$ 10,009	¥ 16,181

X

- Definition

Represents amount of borrowings provided to third-parties.

+ References

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- Definition

VAT is deducted by subtracting the deductible amount from the VAT payable in the regular VAT return submitted to the tax authorities.

+ References

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X

- Definition

Represents the amount of prepaid promotion expenses.

+ References

No definition available.

+ Details

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X

- Definition

Represents the amount of prepaid service fees.

+ References

No definition available.

+ Details

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- Definition

Represents deposits made in advance to be applied to the next accounting period.

+ References

No definition available.

+ Details

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- Definition

Represents the amount receivables due from third party.

+ References

No definition available.

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- Definition

Represents the amount of staff advances.

+ References

No definition available.

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- Definition

Amount of current assets classified as other.

+ References

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-Publisher FASB
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-SubTopic 10
-Section S99
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- Definition

Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer.

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- Definition

Amount of asset related to consideration paid in advance for rent that provides economic benefits within a future period of one year or the normal operating cycle, if longer.

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