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Summary of significant accounting policies (Tables)

12 Months Ended

Dec. 31, 2023

Accounting Policies [Abstract]

Schedule of estimated useful life of property and equipment

Depreciation on property and equipment is calculated on the straight-line method over the estimated useful lives of the assets as below:

Category						Estimated useful life
Machinery and electronic equipment						3 – 10 years
Transportation vehicles						4 years
Office and other equipment						5 years
Leasehold improvements						Shorter of the lease term and the estimated useful lives of the assets

Schedule of intangible assets, net

In determining the useful life of an intangible asset, the Group considers the factors such as the expected use of the asset by the Group, and any legal, regulatory, or contractual provisions that may limit the useful life:

Category						Estimated useful life
Software						3 years
Software license rights						3 years
Patent						3 years
Trademarks						10 years

Intangible assets, net consisted of the following:

			As of December 31,
			2022						2023
			RMB						RMB
Software			103,509						121,950
Software license rights			—						143,725
Others			—						2,794
Intangible assets			103,509						268,469
Less: accumulated amortization			(58,648)						(86,183)
Less: impairment provision			—						(2,945)
Intangible assets, net			44,861						179,341

Schedule of prior period reclassifications

			As of December 31, 2022
			Before reclassification						After reclassification
			RMB						RMB
Provisions			—						30,716
Other non-current liabilities			30,716						—

			Year ended December 31, 2021												Year ended December 31, 2022
			Before reclassification						After reclassification						Before reclassification						After reclassification
			RMB						RMB						RMB						RMB
Selling and marketing expenses			(82,827)						—						(86,597)						—
General and administrative expenses			(525,041)						—						(1,223,610)						—
Selling, general and administrative expenses			—						(607,868)						—						(1,310,207)
Change in fair value of an equity security			—						—						(16,843)						—
Gains on sale of an equity security			—						—						59,728						—
Gains on deconsolidation of a subsidiary			10,579						—						71,974						—
Change in fair value of warrant liabilities			(111,299)						—						(3,245)						—
Government grants			34,507						—						59,393						—
Foreign currency exchange gains (losses), net			18,315						—						(18,216)						—
Other non-operating (expenses) income			—						(47,898)						—						152,791

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The tabular disclosure of useful life of property and equipment.

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Tabular disclosure of prior period adjustments to previously issued financial statements including (1) the effect of the correction on each financial statement line item and any per-share amounts affected for each prior period presented (2) the cumulative effect of the change on retained earnings or other appropriate components of equity or net assets in the statement of financial position, as of the beginning of the earliest period presented, and (3) the effect of the prior period adjustments (both gross and net of applicable income tax) on the net income of each prior period presented in the entity's annual report for the year in which the adjustments are made.

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Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment.

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