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Taxation - Summary of Net Deferred Tax Assets (Detail) - CNY (¥) ¥ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Components of Deferred Tax Assets [Abstract]
Net operating loss carry-forwards	¥ 70,985	¥ 86,679	¥ 86,628
Deductible advertising expenses	262,801	161,842	87,639
Others	1,062	1,511	1,490
Total deferred tax assets	334,848	250,032	175,757
Less: valuation allowance	(334,848)	(250,032)	(175,757)	¥ (75,501)
Total deferred tax assets, net of valuation allowance	¥ 0	¥ 0	¥ 0

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Deferred Tax Assets Deductible Advertising Expenses.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
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Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

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-Publisher FASB
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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards.

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Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences, classified as other.

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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