Percentage of ownership interest sold in subsidiary.

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- Definition

The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

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- Definition

Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

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- Definition

Amount before tax of gain (loss) recognized on the sale or disposal of a disposal group. Excludes discontinued operations.

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Indicates line item in statement of income that includes gain (loss) recognized on sale or disposal of disposal group. Excludes discontinued operation.

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- Definition

Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

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- Definition

Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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Segment (Details) ¥ in Thousands, $ in Thousands			12 Months Ended
Segment (Details) ¥ in Thousands, $ in Thousands	Nov. 15, 2023 CNY (¥)	Nov. 15, 2023 USD ($)	Dec. 31, 2023 CNY (¥) segment	Dec. 31, 2023 USD ($) segment	Dec. 31, 2022 CNY (¥)	Dec. 31, 2021 CNY (¥)
Segment Reporting Information [Line Items]
Number of operating segments \| segment			2	2
Net revenues			¥ 1,876,989	$ 264,368	¥ 1,202,670	¥ 720,768
Segment profit			661,378	$ 93,153	471,987	381,796
Percentage of equity interest sold in subsidiary	100.00%	100.00%
Intellectual property right at a total consideration \| $		$ 3,700
Gain on disposal in other operating income	¥ 6,100	$ 900
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal, Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Operating Income (Expense), Net	Other Operating Income (Expense), Net
LiDAR segment \| Operating segments
Segment Reporting Information [Line Items]
Segment profit			643,325		458,403	370,466
LiDAR segment \| Operating segments \| Product
Segment Reporting Information [Line Items]
Net revenues			1,738,027		1,127,900	686,533
Cost of revenues			1,176,472		707,617	326,160
LiDAR segment \| Operating segments \| Service
Segment Reporting Information [Line Items]
Net revenues			112,099		50,803	14,702
Cost of revenues			30,329		12,683	4,609
Gas detection segment \| Operating segments
Segment Reporting Information [Line Items]
Net revenues			26,863		23,967	19,533
Cost of revenues			8,810		10,383	8,203
Segment profit			¥ 18,053		¥ 13,584	¥ 11,330